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Split hearing into speech and hearing - #473

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jmrplens merged 3 commits into
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split-speech
Aug 2, 2026
Merged

Split hearing into speech and hearing#473
jmrplens merged 3 commits into
mainfrom
split-speech

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@jmrplens

@jmrplens jmrplens commented Aug 2, 2026

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What and why

phonometry.hearing held two subjects that share a word and nothing else. Speech intelligibility scores a transmission channel and is read by whoever designs a room or a public address system; hearing conservation is about the ear and is read by an occupational hygienist. The generated reference and the sidebar separated them long ago, which is why the reference had a speech section drawing from a package called something else. The code is what had not caught up.

  • phonometry.speech: STI and STIPA (IEC 60268-16), the Speech Intelligibility Index (ANSI S3.5-1997) with its four band-importance procedures and the standard speech spectra, and STOI/ESTOI.
  • phonometry.hearing: what its name says. Audiometric thresholds (ISO 7029, ISO 389-7), noise-induced hearing loss (ISO 1999) and daily noise exposure (ISO 9612).

No module is renamed and no reference page moves, so this is the cheapest of the taxonomy splits and the only one that removes a consistency exception instead of adding URLs. Five sections still carry a key that is not the name of a single subpackage: rooms and environment wait for the steps that rename their packages, and filters, aeroacoustics and power are the three documented sections that deliberately span two parents.

Compatibility follows the pattern the metrology split established: the three pre-split module paths still import and delegate with a notice, reading a moved name from the namespace it left (hearing.stipa) still works, dir() still lists them, and all of it goes in 5.0. The frozen snapshot of pre-split paths grows by three.

The renderers split the same way, so _plot/hearing.py becomes two modules with their own translation tables, and the Spanish labels of the speech half get the test they never had: the four vocal efforts of the ANSI S3.5 spectra and the four band-importance labels are keys reached through the result rather than written in the renderer, so a literal search does not see them and a mutation of the table now fails the test.

Also fixed here

The snippet gate that landed with the previous split earned its place twice.

It caught the SII guide importing the new speech package into a block that already bound speech as the variable holding the speech spectrum, which is the silent-rebinding failure it exists for. And once widened, it caught a defect already on main: llms.txt, the first thing an assistant reads, opened with from phonometry import filters, signal when the package has been signals since the rename. The gate now covers the README, the PyPI long description and llms.txt the same way it covers a guide, and reads the generated dumps block by block, since those glue unrelated pages and carrying an import across a page boundary invents collisions no reader can hit.

Two more from the review: the fiche generator still called ph.hearing.sti_from_impulse_response and its SII neighbour, running on a deprecation notice that nothing turns red; and three links pointed at src/phonometry/hearing/sii.py from the errata page in both languages and in the GitHub mirror.

Validation

No new computation: this moves code. The full suite passes (7864 passed, 23 skipped) and the conformance report, the committed figures and the example fiches are byte-for-byte identical to main, which is the evidence that nothing was recomputed. The fiches were regenerated after the generator fix and still match.

Checklist

Ran locally, same as CI:

  • ruff check .
  • mypy src scripts
  • bandit -r src
  • pytest -q

Regenerated where this change touches them:

  • make conformance (no diff)
  • make api-docs (no diff beyond the three moved module paths in the generated pages)
  • make llms
  • make reports plus check_reports.py (no diff: all 67 fiches match)
  • check_figures.py and check_figure_contrast.py (no diff)
  • make pypi-readme after editing README.md
  • make snippets

Always:

  • Documentation updated in English and Spanish, kept in step (parity passes, 149/149)
  • New package path added to .github/labeler.yml
  • CHANGELOG entry under [Unreleased]

Also run: the site builds clean with the link validator green, check:math, generate_site_reports.py --check and check_errata_evidence.py.

Review in cubic

Summary by CodeRabbit

  • New Features

    • Added a dedicated speech namespace for STI, SII, STOI, ESTOI, and speech-spectrum functionality.
    • Added English and Spanish plotting for speech intelligibility results.
    • Preserved compatibility with existing speech-related paths through deprecation support.
  • Documentation

    • Updated guides, API references, examples, and published materials to distinguish speech and hearing capabilities.
    • Documentation now reflects eighteen domain namespaces.
  • Tests

    • Added coverage for Spanish plot labels, compatibility behavior, and documentation validation.

The package held two subjects that share a word and nothing else. Speech
intelligibility scores a transmission channel and is read by whoever designs a
room or a public address system; hearing conservation is about the ear and is
read by an occupational hygienist. The generated reference and the sidebar had
separated them long ago, which is why the reference had a speech section
drawing from a package called something else; the code is what had not caught
up.

STI, SII and STOI become phonometry.speech. The audiometric thresholds, the
ISO 1999 hearing loss and the ISO 9612 exposure stay in phonometry.hearing,
which is now what its name says. No module is renamed and no reference page
moves, so this is the cheapest of the taxonomy splits and the one that removes
an exception rather than adding a URL.

Compatibility follows the pattern the metrology split established: the three
pre-split module paths still import and delegate with a notice, reading a
moved name from the namespace it left still works, dir() still lists them, and
all of it goes in 5.0. The frozen snapshot of pre-split paths grows by three.

The renderers split the same way, so _plot/hearing.py becomes two modules with
their own translation tables. The speech half gets the Spanish test it never
had, including the four vocal efforts of the ANSI S3.5 spectra, which are
table keys reached through the result rather than written in the renderer.

The snippet gate earned its place here: it caught the SII guide importing the
new speech package into a block that already bound `speech` as the variable
holding the speech spectrum. The variable is renamed.
From an adversarial review of the split.

The fiche generator still called the library through the namespace the names
left: `ph.hearing.sti_from_impulse_response` and its SII neighbour, the two
factories behind the STI and SII example fiches. They ran on a deprecation
notice nothing turns red, and they would have stopped running in 5.0. The
sibling scripts were migrated with the split; these two were missed.

The snippet gate looked at the guides and at nothing else, which is where the
one broken example was hiding: `llms.txt`, the first thing an assistant reads,
opened with `from phonometry import filters, signal` and the package has been
`signals` since the rename. The gate now covers the README, the PyPI long
description and `llms.txt` the same way it covers a guide, and it reads the
generated dumps too. Those dumps glue unrelated pages into one file, so they
are read block by block: carrying an import across a page boundary invents
collisions no reader can hit, which is what the first run reported. A block
that passes `...` to a call is a sketch of a call, not a computation, so it is
read but not run; the README leads with one.

Three links pointed at `src/phonometry/hearing/sii.py`, which is now under
`speech`, from the errata page in both languages and in the GitHub mirror. Two
test-data READMEs cited test files that moved, one of them in this split and
one back in the 3.2 modularization.

The Spanish test for the speech renderers claimed to hold the translation
table to its contents and did not: deleting three of the four band-importance
labels left it green, because it exercised one procedure and never read the
legend. It now checks all four, and a mutation of the table fails it.

The CHANGELOG said three sections carry a key that is not a subpackage name
and then listed four things, one of which is itself three. It is five, and
they are named.
Copilot AI review requested due to automatic review settings August 2, 2026 00:19

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Sorry @jmrplens, you have reached your weekly rate limit of 500000 diff characters.

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@github-actions github-actions Bot added documentation Improvements or additions to documentation conformance Standard clause coverage, reference values or errata errata Confirmed defect in a published standard, tracked in docs/ERRATA.md validation Reference data and oracles used to check results against normative values api Public API surface, naming and deprecations figures Generated plots, diagrams and animations reports Accredited-format .report() fiches and their rendering site Documentation website i18n English and Spanish translations ci Workflows, linting and developer tooling area: hearing Audiometric thresholds, hearing loss and noise exposure area: core Shared internals and cross-cutting code every domain depends on labels Aug 2, 2026
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Review Change Stack

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info
⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: bb99b5a5-2501-41f9-b621-8c7c36fda526

📥 Commits

Reviewing files that changed from the base of the PR and between e0a3a22 and cb09d7c.

📒 Files selected for processing (23)
  • CHANGELOG.md
  • scripts/check_doc_snippets.py
  • src/phonometry/_plot/aircraft.py
  • src/phonometry/_plot/building.py
  • src/phonometry/_plot/common.py
  • src/phonometry/_plot/electroacoustics.py
  • src/phonometry/_plot/emission.py
  • src/phonometry/_plot/environmental.py
  • src/phonometry/_plot/hearing.py
  • src/phonometry/_plot/materials.py
  • src/phonometry/_plot/metrology.py
  • src/phonometry/_plot/psychoacoustics.py
  • src/phonometry/_plot/room.py
  • src/phonometry/_plot/speech.py
  • src/phonometry/_plot/underwater.py
  • src/phonometry/_plot/vibration.py
  • src/phonometry/electroacoustics/frequency_response.py
  • src/phonometry/psychoacoustics/psychoacoustic_annoyance.py
  • src/phonometry/psychoacoustics/tone_audibility.py
  • src/phonometry/room/reverberation_prediction.py
  • tests/hearing/test_hearing_plot_i18n.py
  • tests/speech/test_speech_plot_i18n.py
  • tests/test_check_doc_snippets.py

📝 Walkthrough

Walkthrough

The pull request creates phonometry.speech for STI, SII, STOI, and ESTOI APIs. It retains legacy hearing imports through compatibility shims, moves speech plotting support, updates validation and tests, and revises documentation and generated examples.

Changes

Speech namespace split

Layer / File(s) Summary
Runtime API and plotting
src/phonometry/...
Adds the speech package, relocates speech renderers, updates root exports, and delegates legacy hearing names.
Validation and migration checks
scripts/..., tests/..., .github/labeler.yml
Updates taxonomy and conformance checks, expands documentation-snippet validation, and tests compatibility and Spanish plotting behavior.
Documentation and published examples
docs/..., site/..., README*, llms*, CHANGELOG.md
Documents separate speech and hearing namespaces and updates speech API examples and references.

Estimated code review effort: 4 (Complex) | ~45 minutes

Sequence Diagram(s)

sequenceDiagram
  participant Caller
  participant Hearing
  participant Speech
  participant Plot
  Caller->>Hearing: access legacy speech API
  Hearing->>Speech: resolve compatibility alias
  Speech->>Plot: render speech result
  Plot-->>Caller: return localized plot
Loading

Possibly related PRs

Suggested reviewers: bito-code-review

Poem

A rabbit moves speech to a new bright nest,
STI and SII now share the crest.
Old hearing paths still guide the way,
Spanish plot labels bloom today.
Tests keep each doorway safe.

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Description check ✅ Passed The description clearly explains the taxonomy split, compatibility plan, validation evidence, checklist results, documentation updates, and changelog entry.
Title check ✅ Passed The title clearly and concisely summarizes the main change: separating the speech and hearing namespaces.
Docstring Coverage ✅ Passed Docstring coverage is 84.38% which is sufficient. The required threshold is 80.00%.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
✨ Finishing Touches
📝 Generate docstrings
  • Create stacked PR
  • Commit on current branch
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch split-speech

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@sourcery-ai

sourcery-ai Bot commented Aug 2, 2026

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Reviewer's Guide

Split speech intelligibility functionality out of the hearing domain into a new phonometry.speech package, updated all plotting/rendering, documentation, compatibility shims, and snippet checks accordingly, while preserving 4.x to 5.0 migration guarantees and adding tests for Spanish plot labels and snippet execution/shadowing behaviour.

Flow diagram for updated documentation snippet checks

flowchart TD
    main --> pages_and_pairs
    pages_and_pairs[_pages] --> pages
    pages_and_pairs --> pairs

    pages --> restated[_restated]
    pages --> published[_published]

    pages_no_restated[pages_without_restated] --> shadowing_normal
    restated --> shadowing_restated

    shadowing_normal[check_shadowing carry_true] --> shadowing_failures_normal
    shadowing_restated[check_shadowing carry_false] --> shadowing_failures_restated

    pairs --> translation_failures[check_translations]

    main -->|args.static_false| execution
    execution --> runnable_pages
    runnable_pages[runnable_site_en_plus_published] --> execution_checks[check_execution]

    subgraph execution_pipeline
        block_list[_blocks] --> filtered_blocks
        filtered_blocks[_is_sketch filter] --> run_page_script
        run_page_script[_run_page] --> stderr_tail
    end
Loading

File-Level Changes

Change Details Files
Move STI, SII, STOI and related helpers from the hearing domain into a new speech domain, with top-level exports and compatibility shims so old module and namespace paths continue to work until 5.0.
  • Introduce src/phonometry/speech/init.py re-exporting STI, SII, STOI APIs and results.
  • Move objective_intelligibility.py, sii.py, and sti.py from phonometry.hearing to phonometry.speech and update intra-package imports and docstrings accordingly.
  • Adjust phonometry.init exports to import speech-related types and functions from phonometry.speech instead of phonometry.hearing.
  • Extend _compat module shims so old module paths (phonometry.sii, phonometry.sti, phonometry.hearing.) redirect to the new speech modules, marking them as part of the 4.x split to be removed in 5.0.
  • Update taxonomy and API reference plumbing (scripts/api_taxonomy.py, docs/api-reference.md, README and site reference pages) to list speech as its own domain and to point speech-related API references at phonometry.speech.*.
src/phonometry/speech/__init__.py
src/phonometry/speech/objective_intelligibility.py
src/phonometry/speech/sii.py
src/phonometry/speech/sti.py
src/phonometry/__init__.py
src/phonometry/_compat.py
scripts/api_taxonomy.py
docs/api-reference.md
README.md
README_PYPI.md
site/src/content/docs/reference/api/index.md
site/src/content/docs/reference/api/speech/*.md
Narrow phonometry.hearing to conservation-only APIs while keeping speech names accessible via namespace and module-path shims with deprecation warnings and dir() visibility.
  • Trim hearing.init to only import and export threshold, noise-induced hearing loss, and occupational exposure symbols; remove direct speech-related imports from all.
  • Add _namespace_shim-based getattr and _namespace_dir-based dir in hearing.init so moved names still resolve from phonometry.hearing until 5.0 and appear in dir() despite not being in all.
  • Extend tests for deprecated aliases to assert that hearing.stipa delegates to ph.stipa with a DeprecationWarning and that non-moved names behave normally.
  • Add pre-split hearing module paths to the frozen _PRE_SPLIT_MODULE_PATHS list used by deprecation/compat tests.
src/phonometry/hearing/__init__.py
tests/test_deprecated_aliases.py
Split plotting renderers so hearing and speech use separate modules, and add language/i18n tests for Spanish labels of the speech plots.
  • Remove STI, SII, STOI plotting functions and related constants/imports from _plot/hearing.py, leaving only hearing-related plots and strings.
  • Create _plot/speech.py with plot_sti, plot_stoi, plot_sii, plot_sii_procedure, and plot_standard_speech_spectrum, including Spanish translation tables keyed by English labels.
  • Wire phonometry.speech result .plot() methods (in speech.sii, speech.sti, speech.objective_intelligibility) to import and delegate to the new speech plotting functions.
  • Update _plotting.py dispatch to import plot_sti and plot_sii from _plot.speech instead of _plot.hearing.
  • Add tests/speech/test_speech_plot_i18n.py to assert Spanish labels for speech plots and validate error behaviour on unsupported languages.
src/phonometry/_plot/hearing.py
src/phonometry/_plot/speech.py
src/phonometry/_plotting.py
src/phonometry/speech/objective_intelligibility.py
src/phonometry/speech/sii.py
src/phonometry/speech/sti.py
tests/speech/test_speech_plot_i18n.py
Extend documentation snippet checking to cover README, PyPI README, and llms.txt, refine shadowing semantics for generated dumps, and skip execution of sketch blocks using ellipsis.
  • Update the high-level description in scripts/check_doc_snippets.py to note inclusion of README and llms.txt, and describe ellipsis-based sketches that are read but not executed.
  • Add _is_sketch helper that detects blocks containing calls with Ellipsis arguments and use it in _run_page so such blocks are excluded from execution while still being parsed for static checks.
  • Modify check_shadowing to accept a carry flag so imports aren’t carried across blocks in generated dumps that stitch unrelated pages, preventing false-positive rebinding collisions.
  • Add _published() and _restated() helpers to enumerate README*, llms.txt and generated llms dumps; incorporate them into _pages() so they get static checks, and adjust main() to run execution checks on site EN pages plus the published files, with carry=False shadowing for restated dumps.
  • Add tests to cover the new behaviours: generated dump not carrying imports across pages, sketches not being executed but still subject to rebinding checks, and unchanged stale-skip reporting.
  • Ensure llms.txt and generated_llms code examples use the correct phonometry.signals name instead of the outdated signal alias.
scripts/check_doc_snippets.py
tests/test_check_doc_snippets.py
scripts/generate_llms.py
llms.txt
llms-full.txt
site/public/llms/*.txt
Update guides, docs, and errata to use the new speech namespace for STI/SII/STOI examples and references, and fix minor import usage in occupational exposure guides.
  • Change example imports and calls in English and Spanish speech-intelligibility guides (site and docs) from phonometry.hearing to phonometry.speech, including loops over VOCAL_EFFORTS/BAND_CENTERS, spectrum access, and fiche examples using ReportMetadata.
  • Update speech-transmission guides and docs to use speech.sti_from_impulse_response, speech.stipa_signal, and speech.stipa in narrative and code snippets, plus API reference links from hearing.sti to speech.sti.
  • Update objective-intelligibility guides to reference speech.objective_intelligibility and speech-domain STI/SII APIs instead of hearing.*.
  • Fix occupational-exposure guides/docs imports to import ReportMetadata alongside hearing instead of pulling hearing from phonometry only.
  • Correct errata references to point to src/phonometry/speech/sii.py instead of the old hearing path.
  • Keep Spanish and English doc parity by updating both MDX and MD sources where speech/hearing naming appears, including getting-started and API index pages describing the number and lineup of domain namespaces.
site/src/content/docs/guides/speech-intelligibility.mdx
site/src/content/docs/es/guides/speech-intelligibility.mdx
docs/speech-intelligibility.md
site/src/content/docs/guides/speech-transmission.mdx
site/src/content/docs/es/guides/speech-transmission.mdx
docs/speech-transmission.md
site/src/content/docs/guides/objective-intelligibility.mdx
site/src/content/docs/es/guides/objective-intelligibility.mdx
site/src/content/docs/guides/occupational-exposure.mdx
site/src/content/docs/es/guides/occupational-exposure.mdx
docs/occupational-exposure.md
site/src/content/docs/reference/errata.md
site/src/content/docs/es/reference/errata.md
docs/ERRATA.md
site/src/content/docs/getting-started.mdx
site/src/content/docs/es/getting-started.mdx
Align tests, conformance report, and internal tooling with the speech namespace for STI/SII/STOI, and update labeler and graph/report generators accordingly.
  • Switch conformance_report.py imports and calls to phonometry.speech.* for STI/SII/STOI-related checks, including _sti_from_mtf and SAMPLE_RATE references.
  • Move hearing tests for STI, STIPA certification, SII, objective intelligibility, and SII/STI reports into tests/speech/, updating imports to the speech modules and fixing references in data README files.
  • Update generate_graphs.py and generate_reports.py to use speech-domain APIs (speech_intelligibility_index, standard_speech_spectrum, sii_procedure, sti_from_impulse_response) and speech.sii constants for graph/report generation.
  • Add an "area: speech" section to .github/labeler.yml keyed to src/phonometry/speech/** and tests/speech/** so PRs touching the new domain get appropriate labels.
  • Adjust iso532_1 data README to mention the updated loudness test module path in psychoacoustics, keeping conformance tooling documentation in sync.
scripts/conformance_report.py
scripts/generate_graphs.py
scripts/generate_reports.py
tests/speech/test_sti.py
tests/speech/test_stipa_certified.py
tests/speech/test_sii.py
tests/speech/test_sii_report.py
tests/speech/test_sti_report.py
tests/speech/test_objective_intelligibility.py
tests/data/stipa/README.md
tests/data/iso532_1/README.md
.github/labeler.yml
Document the hearing/speech split and taxonomy changes in CHANGELOG and top-level docs.
  • Add a detailed Changed entry in CHANGELOG.md describing the hearing namespace split, what moved to speech, remaining multi-parent sections, and compatibility behaviour for 4.0 vs 5.0.
  • Update docs/getting-started.md and README* to note eighteen domain subpackages instead of seventeen and to list separate speech and hearing domain descriptions in the namespace tables.
  • Ensure API reference index and other summary tables align with the new domain count and speech/hearing breakdown.
CHANGELOG.md
docs/getting-started.md
README.md
README_PYPI.md
site/src/content/docs/getting-started.mdx
site/src/content/docs/es/getting-started.mdx

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Pull request overview

This PR completes the long-standing taxonomy split between speech intelligibility and hearing conservation by introducing phonometry.speech and narrowing phonometry.hearing accordingly, while preserving backward compatibility via deprecation shims and updating docs/snippet-validation to match the new module layout.

Changes:

  • Introduces src/phonometry/speech/ as the home for STI/STIPA, SII (incl. procedures and standard spectra), and STOI/ESTOI; updates imports/re-exports across the package.
  • Narrows phonometry.hearing to conservation-focused APIs and adds namespace shims so hearing.<moved_name> continues to resolve (with deprecations) until 5.0.
  • Splits plotting renderers (_plot/hearing.py → add _plot/speech.py) and strengthens documentation snippet gating (including generated dumps and sketch blocks), plus adds Spanish speech plot i18n tests.

Reviewed changes

Copilot reviewed 61 out of 61 changed files in this pull request and generated no comments.

Show a summary per file
File Description
tests/test_deprecated_aliases.py Extends frozen pre-split import-path coverage and adds namespace-resolution test for moved speech names via hearing.
tests/test_check_doc_snippets.py Adds tests for generated-dump scope handling and for “sketch” blocks being read but not executed.
tests/speech/test_stipa_certified.py Updates internal imports to the new phonometry.speech.sti location.
tests/speech/test_sti.py Updates STI test imports to the new speech module path.
tests/speech/test_sti_report.py Switches report-related STI imports to phonometry.speech.
tests/speech/test_speech_plot_i18n.py New tests pinning EN/ES behavior of speech .plot(language=...) renderers.
tests/speech/test_sii.py Updates SII tests to import from phonometry.speech.
tests/speech/test_sii_report.py Switches SII report tests to use phonometry.speech APIs.
tests/speech/test_objective_intelligibility.py Updates STOI/ESTOI tests to the new phonometry.speech.objective_intelligibility.
tests/data/stipa/README.md Fixes test-path references after moving STIPA tests under tests/speech/.
tests/data/iso532_1/README.md Updates loudness test consumer path reference.
src/phonometry/speech/sti.py Redirects STIResult plotting to _plot.speech renderers.
src/phonometry/speech/sii.py Redirects SII-related plotting to _plot.speech renderers.
src/phonometry/speech/objective_intelligibility.py Updates doc references and redirects plotting to _plot.speech.
src/phonometry/speech/init.py New speech namespace exporting STI/SII/STOI public surface.
src/phonometry/hearing/init.py Narrows hearing namespace and adds PEP 562 shims (__getattr__, __dir__) to serve moved speech names until 5.0.
src/phonometry/_report/sti.py Updates STI report type references to phonometry.speech.sti.
src/phonometry/_report/sii.py Updates SII report type references to phonometry.speech.sii.
src/phonometry/_plotting.py Rehomes plot renderer re-exports for STI/SII to _plot.speech.
src/phonometry/_plot/speech.py New speech plotting module with its own EN/ES string table and renderers for STI/SII/STOI and speech spectra.
src/phonometry/_plot/hearing.py Removes speech-intelligibility plotting code/strings after the split.
src/phonometry/_compat.py Updates 4.x move-map to route old STI/SII/hearing speech paths to phonometry.speech.*.
src/phonometry/init.py Moves top-level re-exports of STI/SII/STOI to import from phonometry.speech.
site/src/content/docs/reference/errata.md Updates errata links to the new src/phonometry/speech/sii.py path.
site/src/content/docs/reference/api/speech/sti.md Updates frontmatter title to speech.sti.
site/src/content/docs/reference/api/speech/sii.md Updates frontmatter title to speech.sii.
site/src/content/docs/reference/api/speech/objective-intelligibility.md Updates title and inline links to phonometry.speech.*.
site/src/content/docs/reference/api/index.md Updates API table entries from hearing.* to speech.* for speech section.
site/src/content/docs/guides/speech-transmission.mdx Updates guide imports/usages from hearing to speech.
site/src/content/docs/guides/speech-intelligibility.mdx Updates guide imports/usages from hearing to speech and avoids name collisions in examples.
site/src/content/docs/guides/occupational-exposure.mdx Adjusts import ordering in examples (hearing remains; ReportMetadata import reordered).
site/src/content/docs/guides/objective-intelligibility.mdx Updates API reference link target to speech.objective_intelligibility.
site/src/content/docs/getting-started.mdx Updates domain-namespace count to reflect the new split.
site/src/content/docs/es/reference/errata.md Spanish errata: updates link to src/phonometry/speech/sii.py.
site/src/content/docs/es/guides/speech-transmission.mdx Spanish guide: switches hearing.* calls to speech.*.
site/src/content/docs/es/guides/speech-intelligibility.mdx Spanish guide: switches hearing.* calls to speech.* and updates examples accordingly.
site/src/content/docs/es/guides/occupational-exposure.mdx Spanish guide: adjusts import ordering in example snippet.
site/src/content/docs/es/guides/objective-intelligibility.mdx Spanish guide: updates API reference link to speech.objective_intelligibility.
site/src/content/docs/es/getting-started.mdx Spanish getting-started: updates domain-namespace count.
site/public/llms/llms-start.txt Updates domain-namespace count for LLM-facing summary.
site/public/llms/llms-speech.txt Updates speech guide dump to import from speech and avoids stale signal usage.
site/public/llms/llms-room-acoustics.txt Updates restated snippets referencing STI APIs to use speech.*.
site/public/llms/llms-hearing-exposure.txt Adjusts import ordering in restated hearing/exposure snippet.
scripts/generate_reports.py Updates report example generation to call ph.speech.* for STI/SII.
scripts/generate_llms.py Fixes generated llms summary import (signals instead of stale signal).
scripts/generate_graphs.py Updates STI/SII internal references in graph generation to phonometry.speech.*.
scripts/conformance_report.py Switches STI/SII/STOI references to ph.speech.* / phonometry.speech.*.
scripts/check_doc_snippets.py Extends snippet checking to README/PyPI/llms surfaces, treats generated dumps as non-carry blocks, and skips execution of sketch blocks.
scripts/api_taxonomy.py Updates taxonomy to place STI/SII/STOI under phonometry.speech.* and fixes section key mapping.
README.md Splits hearing row into separate speech and hearing rows and updates namespace count.
README_PYPI.md Mirrors README taxonomy split (speech vs hearing).
llms.txt Fixes minimal usage import (signals not signal).
llms-full.txt Propagates signals import fix and updates taxonomy counts + speech/hearing table rows in generated dump.
docs/speech-transmission.md Updates mirrored docs to use speech.* instead of hearing.*.
docs/speech-intelligibility.md Updates mirrored docs to use speech.* instead of hearing.*.
docs/occupational-exposure.md Adjusts import ordering in mirrored occupational exposure doc.
docs/getting-started.md Updates mirrored docs domain-namespace count.
docs/ERRATA.md Updates mirrored errata link to new speech/sii.py path.
docs/api-reference.md Updates mirrored API reference taxonomy table and namespace count.
CHANGELOG.md Adds an Unreleased entry describing the hearing→speech split and compatibility approach.
.github/labeler.yml Adds "area: speech" label automation for src/phonometry/speech/** and tests/speech/**.

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Actionable comments posted: 3

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@CHANGELOG.md`:
- Around line 1008-1010: Update the release note’s moved speech API list to
include STI, STIPA, SII, STOI, and ESTOI, preserving the existing
phonometry.speech and phonometry.hearing module descriptions.

In `@scripts/check_doc_snippets.py`:
- Around line 246-251: Update _is_sketch to inspect each ast.Call node’s keyword
arguments in node.keywords as well as positional args, treating any keyword
value that is an ast.Constant Ellipsis as a sketch. Add a regression test
covering a call such as function(value=...) and verify _run_page does not
execute it.

In `@src/phonometry/_plot/speech.py`:
- Line 79: Update the speech renderer docstrings in
src/phonometry/_plot/speech.py at lines 79-79 and 172-172: change the STIResult
reference to phonometry.speech.sti.STIResult and the SIIResult reference to
phonometry.speech.sii.SIIResult, respectively, while leaving the surrounding
documentation unchanged.
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📥 Commits

Reviewing files that changed from the base of the PR and between 02a1f8a and e0a3a22.

📒 Files selected for processing (61)
  • .github/labeler.yml
  • CHANGELOG.md
  • README.md
  • README_PYPI.md
  • docs/ERRATA.md
  • docs/api-reference.md
  • docs/getting-started.md
  • docs/occupational-exposure.md
  • docs/speech-intelligibility.md
  • docs/speech-transmission.md
  • llms-full.txt
  • llms.txt
  • scripts/api_taxonomy.py
  • scripts/check_doc_snippets.py
  • scripts/conformance_report.py
  • scripts/generate_graphs.py
  • scripts/generate_llms.py
  • scripts/generate_reports.py
  • site/public/llms/llms-hearing-exposure.txt
  • site/public/llms/llms-room-acoustics.txt
  • site/public/llms/llms-speech.txt
  • site/public/llms/llms-start.txt
  • site/src/content/docs/es/getting-started.mdx
  • site/src/content/docs/es/guides/objective-intelligibility.mdx
  • site/src/content/docs/es/guides/occupational-exposure.mdx
  • site/src/content/docs/es/guides/speech-intelligibility.mdx
  • site/src/content/docs/es/guides/speech-transmission.mdx
  • site/src/content/docs/es/reference/errata.md
  • site/src/content/docs/getting-started.mdx
  • site/src/content/docs/guides/objective-intelligibility.mdx
  • site/src/content/docs/guides/occupational-exposure.mdx
  • site/src/content/docs/guides/speech-intelligibility.mdx
  • site/src/content/docs/guides/speech-transmission.mdx
  • site/src/content/docs/reference/api/index.md
  • site/src/content/docs/reference/api/speech/objective-intelligibility.md
  • site/src/content/docs/reference/api/speech/sii.md
  • site/src/content/docs/reference/api/speech/sti.md
  • site/src/content/docs/reference/errata.md
  • src/phonometry/__init__.py
  • src/phonometry/_compat.py
  • src/phonometry/_plot/hearing.py
  • src/phonometry/_plot/speech.py
  • src/phonometry/_plotting.py
  • src/phonometry/_report/sii.py
  • src/phonometry/_report/sti.py
  • src/phonometry/hearing/__init__.py
  • src/phonometry/speech/__init__.py
  • src/phonometry/speech/objective_intelligibility.py
  • src/phonometry/speech/sii.py
  • src/phonometry/speech/sti.py
  • tests/data/iso532_1/README.md
  • tests/data/stipa/README.md
  • tests/speech/test_objective_intelligibility.py
  • tests/speech/test_sii.py
  • tests/speech/test_sii_report.py
  • tests/speech/test_speech_plot_i18n.py
  • tests/speech/test_sti.py
  • tests/speech/test_sti_report.py
  • tests/speech/test_stipa_certified.py
  • tests/test_check_doc_snippets.py
  • tests/test_deprecated_aliases.py

Comment thread CHANGELOG.md Outdated
Comment thread scripts/check_doc_snippets.py Outdated
Comment thread src/phonometry/_plot/speech.py Outdated
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.99%. Comparing base (02a1f8a) to head (cb09d7c).

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##             main     #473   +/-   ##
=======================================
  Coverage   96.98%   96.99%           
=======================================
  Files         253      255    +2     
  Lines       38487    38505   +18     
=======================================
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+ Misses       1160     1158    -2     

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Numerical conformance report

533/533 conformance checks pass across 57 domains and 362 standards - filters class 1 - weightings within IEC 61672-1 class 1.

Each row pins a standard clause to its expected normative value and the value the library computes. Every section below is collapsible and stays collapsed while all of its rows pass; a section with any failing row opens automatically.

Numerical validation - filters & weightings: class showcase (IEC 61260-1 · IEC 61672-1 · ISO 7196)

IEC 61260-1:2014 class per filter architecture (order 6, one-third-octave, 100 Hz-10 kHz, fs = 48 kHz). For each architecture the table shows, at its binding band, the measured relative attenuation and the class-1 limit it must clear, so the number and the range it must sit in are both visible. A positive margin means the acceptance limits are met with that much room.

Architecture Class verdict Binding band Measured rel. atten. Class-1 limit Margin cl.1 Margin cl.2
butter Class 1 (default) 100 Hz +0.00 dB ≥ -0.40 dB +0.400 dB +0.600 dB
cheby1 By design (passband ripple) 6310 Hz +0.19 dB ≥ +1.44 dB -1.246 dB -0.837 dB
cheby2 Class 1 100 Hz +0.00 dB ≥ -0.40 dB +0.400 dB +0.600 dB
ellip By design (passband ripple) 10000 Hz +0.10 dB ≥ +1.32 dB -1.218 dB -0.813 dB
bessel By design (soft rolloff) 100 Hz +12.46 dB ≥ +16.60 dB -4.133 dB -3.133 dB

Only Butterworth (the library default) and Chebyshev-II are class-compliant architectures. Chebyshev-I and elliptic trade the mask for passband ripple, and Bessel for a maximally-flat group delay (soft rolloff); they cannot satisfy the IEC 61260-1 Class 1/2 attenuation mask by construction, so they are labelled By design - this is expected, not a failure or regression.

Frequency-weighting conformance (A/C: IEC 61672-1 Table 3; G: ISO 7196 A.3). The max deviation from nominal is informational (it falls at a frequency extreme where the tolerance is widest and asymmetric); compliance is judged at the binding frequency - the one with the least headroom - where the deviation, the applicable tolerance band and the headroom are shown together.

Curve fs Max dev. from nominal (info) Binding freq Deviation there Tolerance band Headroom
A 48 kHz -0.867 dB @ 19953 Hz 1000 Hz +0.000 dB [-0.70, +0.70] dB +0.700 dB
A 96 kHz -0.482 dB @ 19953 Hz 1000 Hz +0.000 dB [-0.70, +0.70] dB +0.700 dB
C 48 kHz -0.900 dB @ 19953 Hz 1000 Hz +0.000 dB [-0.70, +0.70] dB +0.700 dB
G 48 kHz +0.047 dB @ 1 Hz 1 Hz +0.047 dB [-1.00, +1.00] dB +0.953 dB
Filters & weightings: 100% (10/10)
Standard Quantity Expected (norm) Computed Δ Status
IEC 61260-1:2014 Table 1 Octave-band filter class (butterworth, fs=48 kHz) class 1 class 1 (margin +0.400 dB) +0.400 dB
IEC 61260-1:2014 Table 1 One-third-octave filter class (butterworth, fs=48 kHz) class 1 class 1 (margin +0.400 dB) +0.400 dB
IEC 61260:1995 / ANSI S1.11-2004 Table 1 Class 0 (strictest) octave-band filter (butterworth, fs=48 kHz) class 0 class 0 (margin +0.150 dB) +0.150 dB
IEC 61260-1:2014 Table F.1 Formula (9) breakpoint mapping, b=3, Omega at G**(1/2) 1.12202 (+/-0.00001) 1.12202 0
IEC 61672-1:2013 Table 3 A-weighting deviation vs class-1 limits (fs=48 kHz) deviation within limits @ 1000 Hz +0.000 dB in [-0.70, +0.70] dB headroom +0.700 dB
IEC 61672-1:2013 Table 3 C-weighting deviation vs class-1 limits (fs=48 kHz) deviation within limits @ 1000 Hz +0.000 dB in [-0.70, +0.70] dB headroom +0.700 dB
ISO 7196:1995 Table 2 / A.3 G-weighting deviation vs +/-1 dB tolerance (fs=48 kHz) deviation within limits @ 1 Hz +0.047 dB in [-1.00, +1.00] dB headroom +0.953 dB
ANSI S1.4-1983 Tables IV/V B-weighting (historical) deviation vs Type 0 limits (fs=48 kHz) deviation within limits @ 200 Hz -0.049 dB in [-0.70, +0.70] dB headroom +0.651 dB
IEC 61012:1990 Table 1 / 2.2 AU-weighting deviation vs separate-unit tolerances (fs=96 kHz) deviation within limits @ 10000 Hz -0.072 dB in [-1.00, +1.00] dB headroom +0.928 dB
IEC 537:1976 (withdrawn) via NASA CR-3406 Table SLD-I D-weighting response vs the published tabulated curve (fs=48 kHz) abs(response - table) <= 0.2 dB (0.45 dB at 1600/2500 Hz) -0.131 dB @ 8000 Hz (bound 0.20 dB) headroom +0.069 dB
Levels & dosimetry: 100% (9/9)
Standard Quantity Expected (norm) Computed Δ Status
IEC 61672-1:2013 (Leq) Leq of a 1 Pa 1 kHz sine 90.97 dB (+/-0.05 dB) 90.969 dB -0.001 dB
IEC 61252:1995 (LEX,8h) 8 h exposure to 90 dB(A) noise 90 dB (+/-0.05 dB) 90.008 dB 0.008 dB
ISO 1996-1:2016 3.6.4 Lden, constant 60 dB in day/evening/night 66.3952 dB (+/-0 dB) 66.3952 dB 0 dB
ISO 1996-2:2007 Annex C.5 Example 1 Tonal audibility ΔLta (Formula C.3), 4 kHz tone 13.7 dB (+/-0.05 dB) 13.66 dB -0.044 dB
ISO 1996-2:2007 Annex C.5 Example 1 Tonal adjustment Kt (Formulae C.4-C.6) 6 dB (+/-0 dB) 6 dB 0 dB
ISO 1996-2:2017 Annex G.2 Combined measurement uncertainty u = √(Σ(cj·uj)²) 2.18 dB (+/-0.01 dB) 2.18 dB -0.002 dB
RD 1367/2007 Annex IV A.3.4.2 b Corrected period level LKeq,d (Manual Ejemplo 3.1: 3 noise phases, 12 h) 57 dB (+/-0 dB) 57 dB 0 dB
RD 1367/2007 Annex I A.2 d Long-term level LK,d (Manual Ejemplo 3.2: 303 operating days of 365) 56 dB (+/-0 dB) 56 dB 0 dB
RD 1367/2007 Annex III Table B1, Article 25 Activity verdict (Manual Ejemplo 3.3: area type a, LK,d 56 dB over 55 dB) phase and daily pass, annual fails, activity not compliant phase and daily pass, annual fails, activity not compliant -
Room & building acoustics: 100% (72/72)
Standard Quantity Expected (norm) Computed Δ Status
CTE DB-HR Annex A, Formula (A.5) Global index R'A for pink noise (Manual Ejemplo 7.2) 51.4 dBA (+/-0.05 dBA) 51.4 dBA 0 dBA
CTE DB-HR Annex A, Formula (A.6) Global index D2m,nT,Atr for road traffic (Manual Ejercicio 7.1) 32.8 dBA (+/-0.05 dBA) 32.8 dBA 0 dBA
Manual de acustica ambiental y arquitectonica, Ejemplo 7.1 Reported R'A of the field-test wall (printed 51 dBA = R'w 52 + C -1) 51 dBA (+/-0 dBA) 51 dBA 0 dBA
Manual de acustica ambiental y arquitectonica, Ejemplo 7.1 Reported R'A,tr of the same wall (printed 47 dBA = R'w 52 + Ctr -5) 47 dBA (+/-0 dBA) 47 dBA 0 dBA
CTE Catalogo de Elementos Constructivos Window size correction of RA (Manual Ejemplo 7.4: 4 m2 window, -2 dB) 24 dBA (+/-0 dBA) 24 dBA 0 dBA
ISO 3382-2:2008 5.3.3 T30 from a synthetic exponential decay (T=1.0 s) 1 s (+/-1%) 1 s 0 s
ISO 18233:2006 (swept-sine method) Sweep deconvolution recovers a known IIR response 0 dB in-band error (+/-0.1 dB) 0.0006 dB 0.001 dB
ISO 717-1 Annex C, Table C.1 Weighted sound reduction index Rw (C;Ctr) Rw 30 (C -2; Ctr -3) Rw 30 (C -2; Ctr -3) sum 31.8 dB
ISO 717-1:2020 Annex C, Table C.2 Enlarged range 50-5000 Hz: Rw (C; Ctr; C50-5000; Ctr,50-5000) Rw 30 (C -2; Ctr -3; C50-5000 -2; Ctr,50-5000 -4) Rw 30 (C -2; Ctr -3; C50-5000 -2; Ctr,50-5000 -4) exact
ISO 717-2 Annex C, Table C.1 Weighted impact sound pressure level Ln,w (CI) Ln,w 79 (CI -11; sum 28.0 dB) Ln,w 79 (CI -11; sum 28.0 dB) +0 dB
ISO 717-2 Annex C, Table C.1 (covered) Weighted impact level of the floor WITH covering Ln,w (CI) Ln,w 64 (CI -3; sum 30.0 dB) Ln,w 64 (CI -3; sum 30.0 dB) +0 dB
ISO 717-2 Annex C, Table C.2 Floor-covering improvement ΔLw and CI,Δ (Formulae (2)/(A.4); CI,Δ from the normative Table 4 floor, not the 2020 print's misprinted C.2 chain) ΔLw 15 dB; CI,Δ -9 dB (Table 4 reference floor) ΔLw 15 dB; CI,Δ -9 dB +0 dB
ISO 354:2003 Eq. 5/8 Sabine inversion recovers absorption area 9.212828 m^2 (+/-0 m^2) 9.212828 m^2 0 m^2
ISO 3382-3:2012 Clause 6.2 Open-plan spatial decay rate D2,S (-6 dB/doubling) 6 dB (+/-0 dB) 6 dB 0 dB
ISO 16283-3:2016 Clause 3.12 Facade R'45 isolates the -1.5 dB incidence correction (S=A) 38.5 dB (+/-0 dB) 38.5 dB 0 dB
ISO 10140-2:2010 Formula (2) Lab airborne R on the ISO 717-1 reference shape -> Rw = 54 Rw 54 dB Rw 54 dB +0 dB
ISO 10140-5:2010+A1 Annex B, Table B.1 Reference elements end-to-end: printed Rw (C; Ctr) of all three Rw(C;Ctr) = 53(-1;-5) / 52(-1;-5) / 33(-1;-2) 53(-1;-5) / 52(-1;-5) / 33(-1;-2) exact
ISO 10140-5:2010+A1 Annex C, Table C.1 Reference floors end-to-end: printed Ln,t,r,0,w (CI) of both Ln,t,r,0,w(CI) = 72(0) / 75(-3) 72(0) / 75(-3) exact
ISO 15186-1:2000 Formula (7) Intensity RI on the ISO 717-1 reference shape -> RI,w = 30 RI,w 30 dB (scalar anchor RI = 34 dB) RI,w 30 dB (RI = 34 dB) +0 dB
ISO 15186-1:2000 Annex B, Table B.1 Adaptation term Kc: all 21 printed rows; (B.1) reduces to (B.2) max abs(Kc - Table B.1) <= 0,05 dB (1 dp print) 0.047 dB (B.1 vs B.2: 4.33e-04 dB) 0.047 dB
ISO 10052:2021 Clause 3.6 Survey R' applies the V/7,5 minimum-area rule 26.197888 dB (+/-0 dB) 26.197888 dB 0 dB
ISO 10052:2021 Clause 3.16 Service-equipment LXY is the 3-position energy average 32.823329 dB (+/-0 dB) 32.823329 dB 0 dB
ISO 10052:2021 Table 4 Reverberation-index estimate (35 <= V < 60, type g) k = [4.5, 5.0, 5.5, 5.5, 5.5] dB k = [4.5, 5.0, 5.5, 5.5, 5.5] dB exact
ISO 717-2:2020 Table 4 / Clause 5.2 Reference-floor weighted level Ln,r,0,w and CI (ISO 16251-1 ΔLw anchor) Ln,r,0,w = 78 dB, CI = -11 dB Ln,r,0,w = 78 dB, CI = -11 dB exact
ISO 16251-1:2014 / ISO 717-2 Formula (2) Floor-covering ΔLw: zero improvement gives ΔLw = 0 ΔLw = 0 dB (ΔL = 0 -> Ln,r = Ln,r,0) ΔLw = 0 dB exact
ISO 16251-1 / ISO 717-2 (Foret et al. 2011, carpet) Measured textile-carpet improvement rates to ΔLw = 29 dB ΔLw = 29 dB (paper, ISO 16251-1) ΔLw = 29 dB +0 dB
ISO 10848-1:2006 Formula (14) Flanking Kij (simplified) matches closed form Kij = 1.9897 dB Kij = 1.9897 dB exact
ISO 10848-1:2006 Formula (12) Flanking equivalent absorption length aj at f_ref aj = 1.2661 m aj = 1.2661 m exact
ISO 10848-1:2006 Clause 7.3.1 Flanking total loss factor η = 2,2/(f·Ts) η = 0.0044 η = 0.0044 exact
ISO 12354-1:2017 Formula (20) vs Hopkins Eq. 2.201 (6 mm glass) Flanking critical frequency (c0²/1,8·cL·h) vs plate coincidence (c0²/2π · sqrt(m''/B')) 2107.4 Hz (+/-1%) 2123.5 Hz 16.156 Hz
EN 29052-1:1992 Formula 4 Apparent dynamic stiffness s't = 4π²·m't·fr² (m't=200 kg/m², fr=25 Hz) 4.934802 MN/m³ (+/-0.000001 MN/m³) 4.934802 MN/m³ 0 MN/m³
EN 29052-1:1992 clause 8.2 NOTE Enclosed-gas stiffness s'a·d = 111 MN·mm/m³ (p₀=0,1 MPa, ε=0,9) 5.55556 MN/m³ (+/-0.0001 MN/m³) 5.55556 MN/m³ 0 MN/m³
EN 29052-1:1992 Formula 2 Floating-floor natural frequency f0 = (1/2π)√(s'/m') (s'=10 MN/m³, m'=100 kg/m²) 50.32921 Hz (+/-0 Hz) 50.32921 Hz 0 Hz
ISO 7626-1:2011 Table 1 / 3.1.2 Closed-form SDOF driving-point mobility peak mag(Y(f0)) = 1/c (c=5 N·s/m) 0.2 m/(N·s) (+/-0.000001 m/(N·s)) 0.2 m/(N·s) 0 m/(N·s)
ISO 7626-1:2011 Table 1 / 3.1.2 Closed-form SDOF static receptance H(0) = 1/k (k=8000 N/m) 0.000125 m/N (+/-0.0001%) 0.000125 m/N 0 m/N
ISO 7626-1:2011 Table 1 FRF reciprocity: impedance × mobility = 1 (at 37 Hz) 1 (= Z·Y) 1 0
ISO 717-2:2020 Table D.4 A-weighted maximum impact level LiA,Fmax of the Annex D worked example 55,350 66... dB (rated 55 dB) 55.350668 dB 0 dB
ISO 16283-2:2020 Table A.1 / JIS A 1418-2:2019 Table A.2 Rubber-ball impact force exposure level LFE, five octave bands 39,0 / 31,0 / 23,0 / 17,0 / 12,5 dB re 1 N at 31,5 to 500 Hz 39 / 31 / 23 / 17 / 12,5 dB re 1 N max |dev| 0.000 dB
ISO 16283-2:2020 Formulae (4), (5), (6) Standardized maximum impact level reduces to 10 lg(V/V0) at T = T0 73,0103 dB (= 70 + 10 lg(100/50)) 73.0103 dB 0 dB
ASTM E413-22 clause 5 (ASTM E1414 CAC) Ceiling attenuation class of two accredited E1414 test reports CAC 34 (ALA 16-091-4); CAC 25, sum 24 dB (Intertek J7488.04) CAC 34; CAC 25, sum 24.0 dB exact
ISO 140-9:1985 clause 3.3 Normalized ceiling attenuation Dn,c = D - 10 lg(A/A0), A0 = 10 m2 43.0103 dB (+/-0 dB) 43.0103 dB 0 dB
Vigran (2008) Eqs. (9.18)-(9.20) Plenum model: Eq. (9.18) converges to Eq. (9.20) as the damping vanishes Eq. (9.20) value, reproduced by Eq. (9.18) 139.5682 dB 0 dB
Hopkins (2007) Eq. 4.89 / Fig. 4.35 Mass-spring-mass resonance of a masonry cavity wall without and with ties 26 Hz (no ties) / 50 Hz (2,5 ties/m2, k = 2 MN/m) 26.15 Hz / 49.93 Hz +0.15 / -0.07 Hz
Hopkins (2007) Table A4 Dynamic stiffness of four wall ties (butterfly, double-triangle, twist) 1,7 / 16,1 / 94,0 MN/m at 50 mm; 43,4 MN/m at 100 mm 1.7 / 16.1 / 94 / 43.4 MN/m exact
ISO 10846-2:2008 3.17 Transfer-stiffness level Lk = 20 lg(|k|/k0), k0 = 1 N/m (|k| = 1 MN/m) 120 dB (+/-0 dB) 120 dB 0 dB
ISO 10846-3:2002 Formula (1) Indirect method k2,1 = -(2πf)²·m2·T (f=500 Hz, m2=10 kg, T=0,01) -986960.4 N/m (+/-0.1%) -986960.4 N/m 0 N/m
ISO 10846-1:2008 Table A.2 FRF relation k = jω·Z at 250 Hz (|k| recovered from impedance) 1001249.2 N/m (+/-0.0001%) 1001249.2 N/m 0 N/m
ISO 7626-2:2015 7.5.2 Rigid-mass calibration: accelerance mag(A) = 1/m (m=10 kg) 0.1 1/kg (+/-0 1/kg) 0.1 1/kg 0 1/kg
ISO 7626-2:2015 7.5.2 Rigid-mass calibration: mobility mag(Y) = 1/(2πf·m) at 100 Hz (m=10 kg) 0.0001592 m/(N·s) (+/-0.001%) 0.0001592 m/(N·s) 0 m/(N·s)
ISO 7626-2:2015 Annex A Normalized random error ε = √((1−γ²)/(2nγ²)): γ²=0,8, n=75 → 4,08 % (< 5 %) 4.08 % (+/-0.01 %) 4.08 % 0.002 %
ISO 7626-1:2011 Table 1 Rigid 1 kg mass at ω = 1000 rad/s: mobility 1e-3, compliance 1e-6 (decades) 0.001 m/(N·s) (+/-1e-07%) 0.001 m/(N·s) 0 m/(N·s)
ISO 10846-3:2002 6.1 Inequality (2) Indirect-method validity limit mag(T) = 0,1 ↔ ΔL1,2 = 20 dB 20 dB (+/-0 dB) 20 dB 0 dB
ISO 10846-3:2002 6.1 Model bias at the validity limit: k_ind/k = 1,1 (0,83 dB ≤ 1 dB, 10 % ≤ 12 %) 1.1 (+/-1e-07%) 1.1 0
ISO 10846-1:2008 Equation (6) Delivered/blocking force F2/F2,b = 1/1,1 at mag(k2,2/kt) = 0,1 (within 10 %) 0.9091 (+/-0) 0.9091 0
ISO 10846-2:2008 / -3:2002 7.6 Linearity: ΔLk ≤ 1,5 dB for input spectra 10 dB apart (linear element: 0) ΔLk ≤ 1,5 dB (7.6 c) 0 dB 0 dB
ISO/TS 7849-1:2009 Formula (8) Calibration L_v from â = 9,81 m/s² at 100 Hz (standard's EXAMPLE) 106.9 dB (+/-0.1 dB) 106.9 dB -0.02 dB
ISO/TS 7849-2:2009 Formula (15) L_W from L_v via measured radiation factor = 10 lg(P/P0) (round-trip) 84.771 dB (+/-0 dB) 84.771 dB 0 dB
ISO/TS 7849-1:2009 Formula (12) Impedance term: L_W − L_v = 10 lg(411/400) at ε = 1, S = S0 0.1178 dB (+/-0 dB) 0.1178 dB 0 dB
EN 15657:2018 Formula (14) Reception-plate L_Ws = resonant-plate power P = ωη(mS)⟨v²⟩ (round-trip) 55.545 dB (+/-0 dB) 55.545 dB 0 dB
EN 15657:2018 Formula (13) Plate loss factor η = 2,2/(f·Ts) at 1 kHz, Ts = 0,3 s 0.0073 (+/-0) 0.0073 0
EN 15657:2018 Formulae (15)/(17) + EN 12354-5 Annex I.3 Source conversion chain reproduces Table I.8 (wall, installed) max abs(L_Ws,inst - Table I.8) <= 0,15 dB 0.055 dB 0.055 dB
ISO 9611:1996 eq. (9) Mean free velocity level (energy mean, v0 = 5e-8 m/s) 72.3017 dB (+/-0 dB) 72.3017 dB 0 dB
ISO 12354-1:2017 Annex L, Tables L.2 to L.4 In-situ element chain: 10 lg sigma, 10 lg sigma_f, eta_tot, Rsitu, a_situ (21 bands x 5 elements) 0 dB (+/-0.1 dB) 0.057 dB 0.057 dB
ISO 12354-1:2017 Annex L, Table L.1 Detailed airborne model: 13 paths + R' per band, R'w = 57 dB max path/total dev <= 0,1 dB; R'w = 57 dB 0.055 dB; 57 dB 0.055 dB
ISO 12354-2:2017 Annex G, Tables G.3, G.4 and G.1 Detailed impact model: Ln,situ, Ln,Dd, Ln,Df, L'n per band, L'n,w = 41 dB max path/total dev <= 0,1 dB; L'n,w (CI) = 41 (2) dB 0.077 dB; 41 (2) dB 0.077 dB
Hopkins (2007) 3.6.3.1 / 4.4.3.1, printed pp. 276-282 and 513-514 Tapping machine: vo, cut-off frequencies fco of a bare slab and two soft coverings (7 000 / 2 300 / 100 Hz) 0 (+/-0.02) 0.0077 0.008
Hopkins (2007) Figs. 3.30/3.31 and 4.73, printed pp. 281 and 524 Over/under-critical case of four walking surfaces; double floating-floor resonances 74 Hz and 195 Hz 4/4 critical cases; fmsms = 74 / 195 Hz (+/-2%) 4/4; 74.1 / 194.0 Hz 0.53%
ISO 12354-2:2017 Annex C / Annex G Table G.4 Floating floor: fo = 160 sqrt(s'/m') = 52,8 Hz, DeltaL = 30 lg(f/fo) over 21 bands, DeltaLw = 32,2 dB 0 dB (+/-0.05 dB) 0.048 dB 0.048 dB
ISO 12354-1:2017 Annex D / Hopkins (2007) Fig. 4.48, printed p. 486 Lining resonance (Formula D.1) 542 Hz and the Table D.1 improvement branches fo = 542 Hz (+/-1%); 8/8 Table D.1 rows 541.9 Hz; 8/8 0.02%
EN 12354-5:2009 Formula (19b/19c) Coupling term → force-source limit 10 lg(mag(Ys)/Re{Yi}) as mag(Ys) ≫ mag(Yi) 40 dB (+/-0.01 dB) 40.001 dB 0.001 dB
EN 12354-5:2009 Annex I.3, Table I.9 Flushing cistern: four paths + Formula (17) total -> 29 dB(A) max path/total dev <= 0.15 dB; total 29 dB(A) 0.055 dB; 29.3 dB(A) 0.055 dB
EN 12354-5:2009 Annex I.2, Table I.6a Whirlpool floor component: mobility correction + path 11 max abs(dev vs Table I.6a) <= 0,15 dB 0.1 dB 0.1 dB
Room acoustics: 100% (16/16)
Standard Quantity Expected (norm) Computed Δ Status
Sabine (W. C. Sabine, 1922) Reverberation time T = k·V/A (V=120 m³, S=158 m², α=0.2) 0.611825 s (+/-0.000001 s) 0.611825 s 0 s
Long, Architectural Acoustics 2e, Table 8.1 Room modes of a 7 x 5 x 3 m room: the six printed frequencies, Hz 42.4 Hz (+/-0.13 Hz) 42.27 Hz -0.126 Hz
Long, Architectural Acoustics 2e, Eq. (8.46) Modal density of a 7 x 5 x 3 m room at 1 kHz = 34 modes/Hz 34 modes/Hz (+/-0.5 modes/Hz) 34.32 modes/Hz 0.32 modes/Hz
Long, Architectural Acoustics 2e, Eq. (17.51) Restaurant self-noise, 20 talkers over 20 metric sabins = 76 dB 76 dB (+/-0.05 dB) 76.021 dB 0.021 dB
Long, Architectural Acoustics 2e, Eq. (17.54) Privacy bound A_tab < 3.16 rt^2 (Q = 2, L_SN = -9 dB) 3.16 m^2 (+/-0.005 m^2) 3.164 m^2 0.004 m^2
Everest, Master Handbook of Acoustics 4th ed, Fig. 7-22 Sabine RT, worked Example 1 @ 1 kHz (untreated 23.3×16×10 ft room, SI) 3.39 s (+/-0.02 s) 3.402 s 0.012 s
Eyring (Norris-Eyring, 1930) Reverberation time T = k·V/(-S·ln(1-ᾱ)) (α=0.2) 0.548369 s (+/-0.000001 s) 0.548369 s 0 s
Arau-Puchades (Acustica 65, 1988, Formula 18) T (α=0.5/0.1/0.1 per wall pair, dims 8×5×3 m) 0.812147 s (+/-0.000001 s) 0.812147 s 0 s
Model identity (uniform absorption) Arau-Puchades ≡ Eyring when ᾱ is uniform 0.548369 s (= Eyring) 0.548369 s 0 s
Vorlander Auralization 2e, Eq. (11.38)-(11.39) Image-source direct-sound amplitude 1/(4πr) and delay r/c (r = 4 m) 0.0198944 (+/-0) 0.0198944 0
Kuttruff Room Acoustics 6e, Eq. (9.23) Audible shoebox image count up to order 10 (= 1560) 156 (+/-0) 156 0
Kuttruff Room Acoustics 6e, Eq. (4.6) Temporal reflection density dN/dt = 4πc³t²/V (t = 0.1 s, V = 120 m³) 42258.2 1/s (+/-0 1/s) 42258.2 1/s 0 1/s
Bies Engineering Noise Control 5e, Eq. (6.44) Room constant R = Sᾱ/(1-ᾱ) (S = 100 m², ᾱ = 0.2 → 25 m²) 25 m² (+/-0 m²) 25 m² 0 m²
Bies Engineering Noise Control 5e, Eq. (6.43) Critical distance rc: direct field = reverberant field (R = 25, Q = 1) 0.160000 (= reverberant term) 0.16 0
Kuttruff Room Acoustics 6e, Eq. (3.44) Schroeder frequency f_s = 2000√(T/V) (V = 200 m³, T = 1 s) 141.421 Hz (+/-0 Hz) 141.421 Hz 0 Hz
Bies Engineering Noise Control 5e, Eq. (6.43) Steady-state SPL Lp = Lw + 10lg(Q/4πr² + 4/R) (Lw=90, r=1, R=25, Q=1) 83.7945 dB (+/-0 dB) 83.7945 dB 0 dB
Psychoacoustics: 100% (14/14)
Standard Quantity Expected (norm) Computed Δ Status
Moore, Psychology of Hearing 6e, p. 77 (Glasberg & Moore 1990) ERB_N number of 1000 Hz = 15.59 Cam 15.59 Cam (+/-0.005 Cam) 15.5932 Cam 0.003 Cam
Moore, Psychology of Hearing 6e, p. 76 (Glasberg & Moore 1990) ERB_N at 1 kHz vs the printed 24.7(4.37F + 1), Hz 132.639 Hz (+/-0.3%) 132.445 Hz -0.194 Hz
ISO 532-1:2017 Annex B.2 Zwicker loudness N, stationary test signal 1 83.2957 sone (+/-0.1%) 83.2957 sone 0 sone
ISO 532-1:2017 Annex B.5 Time-varying loudness Nmax, technical signal 14 (aircraft, free field) 22.6399 sone (+/-0.1%) 22.6399 sone 0 sone
ISO 532-1:2017 Annex B.5 Time-varying loudness Nmax, technical signal 15 (vehicle interior, diffuse field) 9.6059 sone (+/-0.1%) 9.6059 sone 0 sone
DIN 45692:2009 Clause 6 Sharpness of the standard 1 kHz reference signal 1 acum (+/-0 acum) 1 acum 0 acum
DIN 45692:2009 Table A.2 Sharpness of critical-band noise at 2.5 kHz (2320-2700 Hz, 4 sone) 1.78 acum (+/-0.089 acum) 1.747 acum -0.033 acum
ISO 226:2023 Table B.1 Equal-loudness contour, 60 phon @ 100 Hz 78.5 dB SPL (+/-0.05 dB SPL) 78.504 dB SPL 0.004 dB SPL
ECMA-418-2:2025 Clause 5.1.8 HMS loudness of a 1 kHz / 40 dB tone (c_N=0.0211964) 1 sone_HMS (+/-0.03 sone_HMS) 0.9843 sone_HMS -0.016 sone_HMS
ECMA-418-2:2025 Clause 6.2.8 HMS tonality of a 1 kHz / 40 dB tone (c_T=2.8758615) 1 tu_HMS (+/-0.03 tu_HMS) 0.9998 tu_HMS 0 tu_HMS
ECMA-418-2:2025 Clause 7 HMS roughness of a 1 kHz / 70 Hz / m=1 / overall 60 dB tone (c_R=0.0180685) 1 asper (+/-0.01 asper) 0.9999 asper 0 asper
ISO 532-2:2017 Clause 3.17 / Annex B.1 Moore-Glasberg loudness of a 1 kHz / 40 dB tone (C=0.0617) 1 sone (+/-0.01 sone) 1.0001 sone 0 sone
ISO 532-3:2023 Annex C.1 Moore-Glasberg-Schlittenlacher peak LTL, steady 1 kHz / 40 dB 1 sone (+/-0.02 sone) 0.9996 sone 0 sone
ECMA-418-2:2025 Clause 9 HMS fluctuation strength of a 1 kHz / 4 Hz / m=1 / overall 60 dB tone (c_F=0.003840572) 1 vacil_HMS (+/-0.01 vacil_HMS) 0.9931 vacil_HMS -0.007 vacil_HMS
Speech transmission (IEC 60268-16): 100% (10/10)
Standard Quantity Expected (norm) Computed Δ Status
IEC 60268-16:2020 A.2.2 STI weighting-factor pair (500 Hz + 1 kHz bands) 0.398 (+/-0.001) 0.398 0
IEC 60268-16:2020 A.3.1.2 Uniform MTF m=0.5 maps to STI=0.5 0.5 (+/-0.01) 0.5 0
IEC 60268-16 Annex M Full-STI worked example: printed MTF + speech/noise spectra -> STI STI 0.76 (MTI row of step 4c) STI 0.758 (max MTI dev 0.00) -0.002
IEC 60268-16:2020 C.3.2 STIPA direct method, Formula (C.1) signal at m=0.2 0.3 (+/-0.01) 0.2992 -0.001
IEC 60268-16:2020 C.3.2 STIPA direct method, Formula (C.1) signal at m=0.5 0.5 (+/-0.01) 0.4998 0
IEC 60268-16:2020 C.3.2 STIPA direct method, Formula (C.1) signal at m=0.8 0.7 (+/-0.01) 0.7002 0
IEC 60268-16:2020 C.3.3 Indirect method: exponential decay RT60=1 s vs Schroeder MTF 0.5885 (+/-0.005) 0.5885 0
IEC 60268-16:2020 C.4.2 Filter-bank slope: +41 dB unmodulated tone one octave below 125 Hz m >= 0.5 (C.4.2 pass criterion) 0.9812 0.481
IEC 60268-16:2020 A.2.2 (audio path) Weighting factors: modulated 500 Hz + 1 kHz pair through stipa() 0.398 (+/-0.005) 0.398 0
IEC 60268-16:2020 A.3.1.2 (audio path) Filter-bank phase: half-octave edge carriers at TI=0.9 0.9 (+/-0.01) 0.8975 -0.003
System measurement (Golay / Kirkeby / Mueller-Massarani): 100% (5/5)
Standard Quantity Expected (norm) Computed Δ Status
Havelock 2008 Part I Ch. 6 (Xiang), Eq. (2) Golay pair: sum of periodic autocorrelations = 2L*delta (L = 4096) 0 (algebraic identity, +/-1e-10) 0 0
Havelock 2008 Part I Ch. 6 (Xiang), Eq. (4) Golay chain recovers a delay+gain system IR (noiseless, exact) 0 (machine precision, +/-1e-13) 0 0
Kirkeby & Nelson 1999 Eq. (17) / Mueller-Massarani 2001 Sec. 3.1 In-band equalization residue equals eps/(|H|^2 + eps) bin by bin 0 (closed form, +/-1e-12) 0 0
Kirkeby & Nelson 1999 (max of x/(x^2+eps) = 1/(2*sqrt(eps))) Out-of-band inverse-filter gain within the regularization cap <= -6.021 dB (analytic cap) -6.034 dB headroom +0.013 dB
Mueller-Massarani 2001 Secs. 4.2-4.3 (group-delay synthesis) Shaped sweep's Welch spectrum follows the pink target, in-band 0 dB in-band deviation (+/-0.5 dB) 0.0652 dB 0.065 dB
Intensity & sound power: 100% (10/10)
Standard Quantity Expected (norm) Computed Δ Status
IEC 61043:1993 Clause 5 Plane-wave intensity I = p^2 / (rho c) 0.00238 W/m^2 (+/-1.5%) 0.00239 W/m^2 0 W/m^2
ISO 3744:2010 Eq. 18 Monopole hemisphere recovers LW (r=4 m) 95 dB (+/-0 dB) 95 dB 0 dB
ISO 9614-2:1996 Eq. 12 Intensity scan recovers LW of an enclosed source 90 dB (+/-0.000001 dB) 90 dB 0 dB
IEC 61043:1993 Table 2 Minimum delta_pI0 per band, probe/processor/instrument, class 1/2 132 tabulated minima reproduced max absolute deviation 0.000 dB 0 dB
IEC 61043:1993 Table 2 Note 1 Separation rule +10 lg(x/25) on all six columns of 25 mm minima (x = 50 mm) 3.0103 dB (+/-0 dB) 3.0103 dB 0 dB
Fahy, Sound Intensity 2e, 6.8 delta_pI0 = 20 dB is a phase mismatch of 0.26 deg (1 kHz, 25 mm) 0.26 deg (+/-0.005 deg) 0.2624 deg 0.002 deg
ISO 9614-1:1993 Eqs (A.1)/(A.2) Temporal variability F1 is the coefficient of variation of M samples 0.185164 (+/-0) 0.185164 0
ISO 4871:1996 clause 3.15 / Annex B Declared L_WAd = L_WA + K_WA (Annex B, L_WA=88, K_WA=2) 90 dB (+/-0 dB) 90 dB 0 dB
ISO 4871:1996 clause 6.2 Single-machine verification boundary L_1 <= L_WAd L_1=90 verified, L_1=91 rejected (L_WAd=90) 90->True, 91->False boundary L_1 = L_WAd
ISO 3741:2010 Eq. 20 Reverberation-room method inverts to a known LW 0 dB error 0 dB 0 dB
Building prediction & uncertainty: 100% (15/15)
Standard Quantity Expected (norm) Computed Δ Status
EN 12354-1:2000 Annex H.3 Airborne prediction R'w (direct + 12 flanking paths) R'w 52 dB (13 paths) R'w 52 dB (13 paths, 52.17) +0.17 dB
EN 12354-1:2000 Annex H.3 (paths) All 12 printed flanking-path values Rij,w max abs(Rij,w - printed) <= 0,05 dB 0.042 dB 0.042 dB
EN 12354-1:2000 Formula (5b) / Annex H.3 DnT,w closure from R'w (both H.3 examples -> 54 dB) DnT,w 54 dB (printed 53,8/54,3) DnT,w 53.63 / 54.13 dB -0.17 dB vs printed
EN 12354-2:2000 Annex E.3 Impact prediction L'n,w = Ln,w,eq - dLw + K 45 dB (+/-0 dB) 45 dB 0 dB
EN 12354-2:2000 Formula (3) / Annex E.3 Standardized impact level L'nT,w (exact 0,032 V form -> 43 dB) L'nT,w 43 dB (exact 42,96; E.3 prints 42,8) L'nT,w 42.96 dB -0.001 dB
EN 12354-3:2000 Annex F Facade airborne prediction (R'tr,s,w / D2m,nT,w single numbers) R'tr,s,w 31 (Ctr -3); D2m,nT,w 33 dB R'tr,s,w 31 (Ctr -3); D2m,nT,w 33 dB 0
EN 12354-4:2000 Annex G / Formula (2) Radiated LW of a wall+door segment (side 1, low bands) LW 63/125 Hz [59.8, 61.2] dB (+/-0.1) LW [59.8, 61.2] dB 0.038 dB
EN 12354-4:2000 Annex E / Table G.9 Exterior level of all four Table G.9 reception cells Lp 36,6 / 28,5 / 44,6 / 37,3 dB (+/-0,05) Lp 36.6 / 28.5 / 44.6 / 37.3 dB 0.046 dB
ISO 12999-1:2020 Table 2 Airborne band uncertainty, situation A @ 1 kHz 1.8 dB (+/-0 dB) 1.8 dB 0 dB
ISO 12999-1:2020 Annex B, Table B.2 One-decimal single numbers Rw / Rw+C50-5000 / Rw+Ctr,50-5000 57.4 / 56.4 / 51.1 dB 57.4 / 56.4 / 51.1 dB +0.00 dB
ISO 12999-1:2020 Annex B, Formulae (B.2)/(B.6) Single-number uncertainties (uncorrelated 0,6/0,8; correlated u(Rw) 1,9) u_uncorr 0.6 / 0.8 dB; u_corr(Rw) 1.9 dB 0.60 / 0.79 dB; 1.90 dB -0.00 dB
ISO 12999-1:2020 Clause 8 / Table 8 Expanded uncertainty U = 1.96 u (95 % two-sided, Rw sit. A) 2.352 dB (+/-0 dB) 2.352 dB 0 dB
ISO 12999-2:2020 Table 4 / Formula (1) Absorption coefficient +/-U (k=2), reproducibility, 20 x 1/3-oct bands U(k=2) = [0.33, 0.26, 0.22, 0.17, 0.13, 0.11, 0.09, 0.08, 0.08, 0.08, 0.08, 0.08, 0.08, 0.09, 0.09, 0.09, 0.1, 0.11, 0.13, 0.16] U(k=2) = [0.33, 0.26, 0.22, 0.17, 0.13, 0.11, 0.09, 0.08, 0.08, 0.08, 0.08, 0.08, 0.08, 0.09, 0.09, 0.09, 0.1, 0.11, 0.13, 0.16] exact
ISO 12999-2:2020 Table 5 / Formula (4) Practical coefficient +/-U (k=2), reproducibility, 5 octave bands U(k=2) = [0.09, 0.08, 0.08, 0.08, 0.1] U(k=2) = [0.09, 0.08, 0.08, 0.08, 0.1] exact
ISO 12999-2:2020 Clause 7, Examples 1/2 Single-number U (k=2): alpha_w and DLalpha,NRD alpha_w +/-0.07, DLalpha +/-1.6 dB alpha_w +/-0.07, DLalpha +/-1.6 dB exact
Outdoor propagation & occupational exposure: 100% (10/10)
Standard Quantity Expected (norm) Computed Δ Status
ISO 9613-1:1993 Table 1 Air attenuation @ 10 degC, 70 %, 1 kHz 3.66 dB/km (+/-0.01 dB/km) 3.658 dB/km -0.002 dB/km
ISO 9613-1:1993 Table 1 Air attenuation @ 0 degC, 20 %, 2 kHz 34.6 dB/km (+/-0.1 dB/km) 34.64 dB/km 0.04 dB/km
ISO 9613-2:1996 Table 2 Atmospheric attenuation grid, 6 conditions x 8 octave bands, dB/km all 48 cells within half a printed digit worst residual 0.939 x tolerance 0.939 x
ISO 9613-2:1996 Eq. (7) Geometrical divergence Adiv = 20 lg(d/d0) + 11 at 100 m 51 dB (+/-0 dB) 51 dB 0 dB
ISO 9613-2:1996 Table 3 Ground b'(0) porous limit -> Agr(250 Hz) = 2(-1.5 + 10.1) 17.2 dB (+/-0 dB) 17.2 dB 0 dB
ISO 9613-2:1996 clause 7.4 Single-edge diffraction saturates at the 20 dB cap 20 dB (+/-0 dB) 20 dB 0 dB
ISO 9613-2:1996 clause 7.4 Double-edge diffraction saturates at the 25 dB cap 25 dB (+/-0 dB) 25 dB 0 dB
ISO 9612:2009 Annex D Task-based LEX,8h + U (welder day, case a) LEX,8h 84.3; U 2.7 dB LEX,8h 84.3; U 2.7 dB -0.01; +0.02 dB
ISO 9612:2009 Annex E Job-based LEX,8h + U (production line, 18 workers) LEX,8h 88.1; U 3.8 dB LEX,8h 88.2; U 3.8 dB +0.06; -0.03 dB
ISO 9612:2009 Annex F Full-day LEX,8h + U (forklift drivers) LEX,8h 90.1; U 3.4 dB LEX,8h 90.1; U 3.4 dB +0.02; +0.03 dB
Materials: absorption, airflow & impedance: 100% (6/6)
Standard Quantity Expected (norm) Computed Δ Status
ISO 11654:1997 Annex A.1 Weighted absorption alpha_w (no indicator) 0.60 (class C, no indic.) 0.60 (class C, '') 0
ISO 11654:1997 Annex A.2 Weighted absorption alpha_w with M indicator 0.60(M) 0.60(M) 0
ISO 9053-2:2020 Annex A.3 Thermal boundary-layer thickness b 0.00183 m (+/-0.00001 m) 0.00183 m 0 m
ISO 9053-2:2020 Annex A.3 Effective ratio of specific heats kappa' 1.37 (+/-0.001) 1.37 0
ISO 10534-1:1996 Eqs (9)/(13)/(14) Absorption from standing-wave ratio s=3 alpha 0.75 (+/-0), |r| 0.5 alpha 0.75, |r| 0.5000 0
ISO 10534-2 Eq. (17) / Annex D Two-microphone round trip recovers a known reflection factor abs(r - (0.3-0.4j)) = 0 (identity, +/-1e-9) 0 0
Scattering & diffusion (ISO 17497): 100% (14/14)
Standard Quantity Expected (norm) Computed Δ Status
ISO 17497-1:2004 Eq (2) Reference speed of sound at 20 C 343.2 m/s (+/-0 m/s) 343.2 m/s 0 m/s
ISO 17497-1:2004 Eqs (1)/(4)/(5) Scattering coefficient (synthetic chain) 0.0931 (+/-0) 0.0931 0
ISO 17497-1:2004 Annex A.5 Expanded uncertainty of scattering coefficient 0.02971 (+/-0) 0.02971 0
ISO 17497-2:2012 Formula (5) Directional diffusion coefficient (QRD, model arc) 0.1099 (+/-0) 0.1099 0
ISO 17497-2:2012 Formula (5) Directional diffusion coefficient (flat reference) 0.0049 (+/-0) 0.0049 0
ISO 17497-2:2012 Formula (7) Normalised diffusion coefficient (QRD, model arc) 0.1055 (+/-0) 0.1055 0
Cox & D'Antonio 3e App. B (2D BEM) Normalised diffusion d_n, N=7 QRD x 6 periods, 200 Hz band (low-band anchor) 0 (+/-0.015) 0 0
Cox & D'Antonio 3e App. B (2D BEM) Normalised diffusion d_n, N=7 QRD x 6 periods, 250 Hz band (low-band anchor) 0.01 (+/-0.015) 0.001 -0.009
Cox & D'Antonio 3e App. B (2D BEM) Normalised diffusion d_n, N=7 QRD x 6 periods, 315 Hz band (low-band anchor) 0.01 (+/-0.015) 0.002 -0.008
Cox & D'Antonio 3e App. B (2D BEM) Normalised diffusion d_n, N=7 QRD x 6 periods, 400 Hz band (low-band anchor) 0.01 (+/-0.015) 0.008 -0.002
ISO 17497-2:2012 Formula (8) Zenith area factor (radians convention) 1.57105 (+/-0) 1.57105 0
Cox & D'Antonio Eq (10.3) QRD deepest well depth (N=7, f0=500 Hz) 0.196 m (+/-0 m) 0.196 m 0 m
Cox & D'Antonio Eq (5.8) + ISO 17497-2 Formula (7) Flat-panel predicted normalised diffusion (self-reference zero) 0 (+/-0) 0 0
Cox & D'Antonio Eq (5.8) + ISO 17497-2 Formula (7) QRD predicted normalised diffusion at 2 kHz (above flat panel) 0.208 (+/-0) 0.208 0
In-situ road absorption (ISO 13472): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
ISO 13472-1:2002 Clause 4.2 Geometrical-spreading factor Kr 0.6667 (+/-0) 0.6667 0
ISO 13472-1:2002 Annex A Maximum-sampled-area radius 1.3425 m (+/-0 m) 1.3425 m 0 m
ISO 13472-2:2010 Clause 5.4.1 Spot-tube upper usable frequency f_u 1989.4 Hz (+/-0.1 Hz) 1989.4 Hz 0 Hz
Precision sound power (ISO 3745 / 9614-3): 100% (4/4)
Standard Quantity Expected (norm) Computed Δ Status
ISO 3745:2012 Clause 10.5 EXAMPLE Expanded uncertainty U (k=2) 4.123 dB (+/-0.001 dB) 4.123 dB 0 dB
ISO 3745:2012 Eq (11) K1 background floor (6 dB edge band) 1.2563 dB (+/-0.0001 dB) 1.2563 dB 0 dB
ISO 3745:2012 Eq (16) Meteorological C1 at 23 C reference -0.1282 dB (+/-0.0001 dB) -0.1282 dB 0 dB
ISO 9614-3:2002 Eqs (5)/(8)/(9) Uniform-intensity LW recovery 80 dB (+/-0 dB) 80 dB 0 dB
Human vibration (ISO 8041 / 2631 / 5349): 100% (15/15)
Standard Quantity Expected (norm) Computed Δ Status
ISO 8041-1:2017 Table B.8 Wk design-goal factor at 6,31 Hz 1.054 (+/-0.1%) 1.0544 0
ISO 8041-1:2017 Table B.9 Wm design-goal factor at 1,585 Hz 0.9342 (+/-0.1%) 0.9342 0
ISO 8041-1:2017 Table 1 Wh factor at the 500 rad/s reference 0.202 (+/-0.15%) 0.202 0
ISO 8041-1:2017 Table B.1 Wb design-goal factor at 6,31 Hz 1.054 (+/-0.1%) 1.0545 0
ISO 8041-1:2017 Table B.1 Wb design-goal factors at 1 / 100 Hz max rel dev ≤ 0,1 % 0.000267 0
ISO 8041-1:2017 Table 1 Wc factor at the 100 rad/s reference 0.5145 (+/-0.1%) 0.5145 0
ISO 8041-1:2017 Table 1 + Table B.3 Wd factors at the 100 rad/s reference and 1 Hz max rel dev ≤ 0,1 % 0.000162 0
ISO 8041-1:2017 Table B.4 We design-goal factor at 8 Hz 0.1263 (+/-0.1%) 0.1263 0
ISO 8041-1:2017 Table B.5 Wf design-goal factors at 0,1585 / 0,1 Hz max rel dev ≤ 0,1 % 0.000098 0
ISO 8041-1:2017 Table B.7 Wj design-goal factors at 6,31 / 8 Hz max rel dev ≤ 0,1 % 0.00001 0
ISO 8041-1:2017 Table 5 + Annex B All nine weightings inside the tolerance envelope (318 printed bands) 0 bands outside the Table 5 tolerances 0 0
ISO 5349-2:2001 Example E.2.1 Single-tool daily exposure A(8) 4.1 m/s^2 (+/-0.05 m/s^2) 4.14 m/s^2 0.037 m/s^2
ISO 5349-2:2001 Example E.3 Forestry three-task A(8) 3.6 m/s^2 (+/-0.05 m/s^2) 3.61 m/s^2 0.01 m/s^2
ISO 5349-1:2001 Eq. (C.1) VWF 10 % lifetime Dy at A(8)=7 4 yr (+/-0.1 yr) 4.04 yr 0.042 yr
Directive 2002/44/EC Art. 3 HAV/WBV action & limit values HAV 2.5/5.0, WBV 0.5/1.15 m/s^2 HAV 2.5/5.0, WBV 0.5/1.15 m/s^2 0
Speech intelligibility (ANSI S3.5-1997): 100% (24/24)
Standard Quantity Expected (norm) Computed Δ Status
ANSI S3.5-1997 Table 3 Band-importance function normalisation 1 (+/-0) 1 0
ASA WG S3-79 SII.C (clause 5.4) Equivalent masking spectrum level at 200 Hz -1.665 (+/-0.001) -1.665 0
ANSI S3.5-1997 clause 5.6 Equivalent disturbance in quiet at 5000 Hz -23.6 dB (+/-0.01 dB) -23.6 dB 0 dB
ASA WG S3-79 SII.C (clause 6) SII, noise 30 dB plus hearing loss 40 dB 0.218454 (+/-0.000001) 0.218454 0
ANSI S3.5-1997 Annex C.2 Worked example (SII.C / R CRAN, errata applied) 0.851375 (+/-0.000001) 0.851375 0
ANSI S3.5-1997 Table C.2 (errata) Masking Zi at 200 Hz, corrected worksheet 34.66 dB (+/-0.01 dB) 34.66 dB -0.002 dB
ASA WG S3-79 SII.C (clause 6) SII, standard speech in quiet, normal hearing 0.99582517 (+/-0.000001) 0.99582517 0
ASA WG S3-79 TO.TST Official one-third-octave test case 0.445 (+/-0.001) 0.445 0
ASA WG S3-79 TO_1.TST Official test case, alternative importance 0.438 (+/-0.001) 0.438 0
ASA WG S3-79 CB.TST Official critical-band test case 0.273 (+/-0.001) 0.273 0
ASA WG S3-79 CB_1.TST Critical band, alternative importance 0.41 (+/-0.001) 0.41 0
ASA WG S3-79 ECB.TST Official equally-contributing test case 0.278 (+/-0.001) 0.278 0
ASA WG S3-79 ECB_1.TST Equally contributing, alternative importance 0.41 (+/-0.001) 0.41 0
ASA WG S3-79 OCTAVE.TST Official octave-band test case 0.491 (+/-0.001) 0.491 0
ASA WG S3-79 OCTAVE_1.TST Octave band, alternative importance 0.323 (+/-0.001) 0.323 0
ANSI S3.5-1997 Annex C.1 Octave-band worked example (SII.C) 0.504 (+/-0.001) 0.504 0
ANSI S3.5-1997 Table C.1 (errata) Level distortion Li, row i = 5 1 (+/-0.01) 1 -0.004
ANSI S3.5-1997 Table 1 Critical-band importance normalisation 1 (+/-0) 1 0
ANSI S3.5-1997 Table 2 Equally-contributing importance, 17 x 0.0588 0.9996 (+/-0) 0.9996 0
ANSI S3.5-1997 Table 4 Octave-band importance normalisation 1 (+/-0) 1 0
ANSI S3.5-1997 Table 4 Octave-band Ui and Xi equal Table 3's 0 dB (+/-0 dB) 0 dB 0 dB
ANSI S3.5-1997 Table 1 Critical-band table, all 21 rows 0 (+/-0) 0 0
ASA WG S3-79 SII.C (clause 6) Flat-input cases, all four procedures 0 (+/-0.000000001) 0.0000000001 0
ANSI S3.5-1997 Table 3 Loud-effort speech spectrum level at 1 kHz 42.16 dB (+/-0 dB) 42.16 dB 0 dB
Objective intelligibility (STOI / ESTOI): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
Taal et al. 2011 (Eq. 6, degenerate) STOI of a signal against itself = 1 (perfect correlation) 1 (+/-0.000001) 1 0
Jensen & Taal 2016 (Eq. 8, degenerate) ESTOI of a signal against itself = 1 (perfect spectral correlation) 1 (+/-0.000001) 1 0
Taal et al. 2011 (monotonicity with SNR) STOI rises from -15 dB to +25 dB SNR speech-shaped noise STOI(+25 dB) - STOI(-15 dB) > 0.2 0.462 (0.389 -> 0.851) 0
Impulsive-sound prominence (NT ACOU 112): 100% (2/2)
Standard Quantity Expected (norm) Computed Δ Status
NT ACOU 112:2002 Formula 1 Predicted prominence, OR=1000 dB/s, LD=30 dB 11.9542 (+/-0.0001) 11.9542 0
NT ACOU 112:2002 Formula 2 Adjustment KI to LAeq at prominence P=10 9 dB (+/-0 dB) 9 dB 0 dB
Impulsive-sound prominence (ISO/PAS 1996-3): 100% (2/2)
Standard Quantity Expected (norm) Computed Δ Status
ISO/PAS 1996-3:2022 3.5 Onset rate of a 30 dB ramp over 0.30 s 100 dB/s (+/-0 dB/s) 100 dB/s 0 dB/s
ISO/PAS 1996-3:2022 Formula 3 Adjustment KI of the ramp onset 7.1176 dB (+/-0 dB) 7.1176 dB 0 dB
Room noise (ANSI S12.2-2019): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
ANSI S12.2-2019 Table 1 NC-40 curve, tangency self-consistency 40 (+/-0) 40 0
ANSI S12.2-2019 Table D.1 RC-31 Mark II curve, 63 Hz level 51 (+/-0) 51 0
ANSI S12.2-2019 clause D.4 RC-35 curve, mid-frequency average LMF 35 (+/-0) 35 0
Hearing threshold (ISO 7029 / ISO 389-7): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
ISO 7029:2017 Table 1 Median threshold, male age 60 at 4 kHz 20.209 dB (+/-0.001 dB) 20.208 dB 0 dB
ISO 7029:2017 Table 2 Upper spread su, male age 60 at 1 kHz 10.153 dB (+/-0.001 dB) 10.153 dB 0 dB
ISO 389-7:2005 Table 1 Free-field reference threshold at 1 kHz 2.4 dB (+/-0 dB) 2.4 dB 0 dB
Measurement uncertainty (GUM / Supplement 1): 100% (7/7)
Standard Quantity Expected (norm) Computed Δ Status
ISO/IEC Guide 98-3-1 clause 9.2 Combined uncertainty, additive model 2 (+/-0) 2 0
ISO/IEC Guide 98-3 Table G.2 Coverage factor, p=0.99, v=16 2.92 (+/-0.005) 2.921 0.001
ISO/IEC Guide 98-3 Annex G.4 Welch-Satterthwaite effective dof 40 (+/-0) 40 0
ISO/IEC Guide 98-3 Annex H.1 End-gauge combined uncertainty uc, nm 31.71 nm (+/-0.01 nm) 31.71 nm 0.001 nm
ISO/IEC Guide 98-3 Annex H.1 End-gauge expanded uncertainty U99, nm 92.1 nm (+/-0.1 nm) 92.1 nm 0.04 nm
ISO/IEC Guide 98-3 Annex H.2 (Table H.3) Correlated V/I/phi budget: uc(R), ohm 0.071 ohm (+/-0.001 ohm) 0.071 ohm 0 ohm
ISO/IEC Guide 98-3-1 Table 3 (clause 9.2.3) Seeded Monte Carlo, rectangular sum: 95 % interval endpoint +/-3.88 (u = 2.0) +/-3.886 (u = 2.002) 0.006
Noise-induced hearing loss (ISO 1999): 100% (6/6)
Standard Quantity Expected (norm) Computed Δ Status
ISO 1999:2013 Table D.2 Median NIPTS, 4 kHz, 90 dB, 20 yr 13 dB (+/-0.5 dB) 12.9 dB -0.057 dB
ISO 1999:2013 Table D.2 Worst-10 % NIPTS, 4 kHz, 90 dB, 20 yr 18 dB (+/-0.5 dB) 17.8 dB -0.239 dB
ISO 1999:2013 Table D.4 Worst-10 % NIPTS, 3 kHz, 100 dB, 40 yr 60 dB (+/-0.5 dB) 59.8 dB -0.172 dB
ISO 1999:2013 Annex C, Formulae (C.6) to (C.8) NIPTS at 1/2/4 kHz, 90 dB, 30 yr, Q = 10 % (annex inputs) 0, 9, 19 dB 0, 9, 19 dB 0 dB
ISO 1999:2013 Annex C, Formula (C.5) Compressed 4 kHz shift, Formula (1) with the annex's H = 36 dB 13.3 dB (+/-0.1 dB) 13.3 dB 0 dB
ISO 1999:2013 Annex C, Formula (C.11) Hearing threshold level with age and noise, 1/2/4 kHz mean, Q = 10 % 31.1 dB (+/-0.1 dB) 31.1 dB 0 dB
Multiple-shock whole-body vibration (ISO 2631-5): 100% (6/6)
Standard Quantity Expected (norm) Computed Δ Status
ISO 2631-5:2018 Formula 3 Daily acceleration dose, 5 x 40 m/s2 peaks 55.97 m/s2 (+/-0.01 m/s2) 55.97 m/s2 -0.002 m/s2
ISO 2631-5:2018 Formula C.3 Stress variable R, Annex C male example 1.22 (+/-0.01) 1.22 0
ISO 2631-5:2018 Formula C.5 Injury probability, Annex C male example 0.37 (+/-0.01) 0.37 -0.003
ISO 2631-5:2018 Annex C NOTE 5 Compressive stress Sd, female example 1.4 MPa (+/-0.01 MPa) 1.4 MPa -0.001 MPa
ISO 2631-5:2018 Annex C NOTE 5 Stress variable R, female example 0.97 (+/-0.01) 0.96 -0.008
ISO 2631-5:2018 Formula 1 vs Annex D Table D.1 Seat-to-spine transfer vs the 256 Hz digital filter (0,5-80 Hz) max abs(Formula 1 - filter) ≤ 0,04 0.001 0.001
Sound absorption in enclosed spaces (EN 12354-6): 100% (2/2)
Standard Quantity Expected (norm) Computed Δ Status
EN 12354-6:2003 Formula 1 Equivalent absorption area, Annex E bare room 2.26 m2 (+/-0.01 m2) 2.26 m2 0.003 m2
EN 12354-6:2003 Formula 5 Reverberation time, Annex E bare room 2.1 s (+/-0.1 s) 2.1 s 0.003 s
Prominent discrete tones (ECMA-418-1): 100% (2/2)
Standard Quantity Expected (norm) Computed Δ Status
ECMA-418-1:2024 Clause 10 Formula (2) Critical band at 1 kHz (f1,c / f2,c / dfc) dfc 162.2 Hz (+/-0.05 Hz); edges 922.2-1084.4 Hz dfc 162.22 Hz; edges 922.2-1084.4 Hz 0.017 Hz
ECMA-418-1:2024 Clause 11.6 Formula (14) Proximity spacing dfprox at 150 / 850 Hz 23 Hz @ 150 Hz; 63.8 Hz @ 850 Hz (+/-0.5 Hz) 23.0 Hz; 63.8 Hz +0.004; +0.044 Hz
Tonal audibility (ISO/PAS 20065): 100% (11/11)
Standard Quantity Expected (norm) Computed Δ Status
ISO/PAS 20065:2016 Formulae (12)-(14) Audibility at 137.3 Hz, Annex E spectrum 1 4.99 dB (+/-0.05 dB) 5.01 dB 0.022 dB
ISO/PAS 20065:2016 Formula (13) Masking index av at 137.3 / 592.2 Hz -2.02 dB @ 137.3 Hz; -2.4 dB @ 592.2 Hz (+/-0.005 dB) -2.017 dB; -2.400 dB +0.003; +0.000 dB
ISO/PAS 20065:2016 Formula (20) Mean audibility of the five spectra, Annex E 6.96 dB (+/-0.05 dB) 6.98 dB 0.018 dB
ISO/PAS 20065:2016 Formula (6) Mean narrow-band level LS from spectrum, Table E.1 49.22 dB (+/-0.02 dB) 49.22 dB -0.001 dB
ISO/PAS 20065:2016 Clause 6 Extended uncertainty U of the 137.3 Hz tone, Table E.2 2.79 dB (+/-0.02 dB) 2.8 dB 0.006 dB
ISO/PAS 20065:2016 Formulae (28)-(29) Extended uncertainty of the mean audibility, Annex E Step 4 1.38 dB (+/-0.01 dB) 1.38 dB -0.003 dB
ISO/PAS 20065:2016 Formula (8) Tone level LT from spectrum, Table E.1 67.96 dB (+/-0.02 dB) 67.96 dB -0.005 dB
ISO/PAS 20065:2016 Clause 5.3.8 Tone detection over the spectrum, Table E.1 tones at [118.4, 137.3, 158.8] Hz tones at [118.4, 137.3, 158.8] Hz exact
ISO/PAS 20065:2016 Clause 5.3.8 Step 3 Same-band FG combination inside analyze_spectrum, Table E.2 row 2 FG 72.15 dB (+/-0.02 dB) 72.15 dB -0.002 dB
ISO/PAS 20065:2016 Formula (17) Multi-tone FG combination, Table E.1 72.15 dB (+/-0.02 dB) 72.15 dB -0.002 dB
ISO/PAS 20065:2016 Formulae (18)/(19) Two-tone separation fD (DIN 45681 Annex J), 137.3 / 212 Hz fD(137.3)=24.09, fD(212)=21.0 Hz; Annex E pair combined fD(137.3)=24.09, fD(212)=21.00 Hz; Annex E pair combined exact
Psychoacoustic annoyance & fluctuation strength (Fastl & Zwicker): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
Fastl & Zwicker Eqs (16.2)-(16.4) Psychoacoustic annoyance, worked (N5,S,F,R) tuple 37.0478 (+/-0.001) 37.0477 0
Fastl & Zwicker Eq (10.2) Fluctuation strength of AM broadband noise (60 dB, m=1, 4 Hz) 3.6943 vacil (+/-0.001 vacil) 3.6943 vacil 0 vacil
Fastl & Zwicker Ch. 10 / Osses et al. 2016 Fluctuation-strength calibration: 1 kHz / 60 dB / m=1 / 4 Hz AM tone 1 vacil (+/-0.05 vacil) 1 vacil 0 vacil
Electroacoustics: distortion & frequency response: 100% (20/20)
Standard Quantity Expected (norm) Computed Δ Status
IEC 60268-3:2013 (14.12.3.2) THD (rel. total RMS, the R convention the clause defines) 0.112853 (+/-0.0001) 0.112853 0
Closed-form harmonic synthesis (THD_F convention) THD (rel. fundamental, the widespread datasheet convention) 0.113578 (+/-0.0001) 0.113578 0
IEC 60268-5:2003 (20.3/20.4) Characteristic sensitivity level, 1 W into 8 ohm at 1 m (flat 90 dB) 90 dB (+/-0.000001 dB) 90 dB 0 dB
IEC 60268-5:2003 (21.2) Effective frequency range = -10 dB crossings (50 Hz / 18 kHz) 50 Hz / 18000 Hz (ref -10 dB crossings) 50.000 Hz / 18000.0 Hz -0.000 / -0.000 Hz
IEC 60268-3:2013 (14.12.5) 2nd-order harmonic distortion d2 (rel. total) 0.099361 (+/-0.0001) 0.099361 0
IEC 60268-4:2014 (11.1/11.3) Microphone sensitivity level, 12.5 mV/Pa -> 20 lg 0.0125 dB re 1 V/Pa -38.0618 dB (+/-0.00001 dB) -38.0618 dB 0 dB
IEC 60268-4:2014 (12.2) Effective frequency range = +/-3 dB tolerance crossings (40 Hz / 18 kHz) 40 Hz / 18000 Hz (+/-3 dB tolerance crossings) 40.000 Hz / 18000.0 Hz 0.000 / -0.000 Hz
IEC 60268-4:2014 (13.2.2) Directivity index of the ideal cardioid, 10 lg 3 dB (11.2.2 a integral) 4.771213 dB (+/-0.005 dB) 4.771214 dB 0 dB
IEC 60268-4:2014 (17.2) Equivalent noise level, 2.5 uV over 12.5 mV/Pa -> 200 uPa = 20 dB SPL 20 dB SPL (+/-0 dB SPL) 20 dB SPL 0 dB SPL
IEC 60268-3:2013 (14.12.7.2 g) Modulation distortion d_m,2 (arithmetic sideband sum over U_2,f2) 0.16 (+/-0.0001) 0.16 0
IEC 60268-3:2013 (14.12.7.2 h) Modulation distortion d_m,3 (arithmetic sideband sum over U_2,f2) 0.08 (+/-0.0001) 0.08 0
IEC 60268-3:2013 (14.12.8.1 a) Difference-frequency distortion d_d,2 (over U_2,ref = 2 U_2,f2) 0.03 (+/-0.0001) 0.03 0
IEC 60268-3:2013 (14.12.8.1 b) Difference-frequency distortion d_d,3 (arithmetic product sum) 0.04 (+/-0.0001) 0.04 0
IEC 60268-3:2013 (14.12.10) Total difference-frequency distortion (8 kHz / 11.95 kHz tones) 0.03605551 (+/-0.0001) 0.03605551 0
ITU-R BS.468-4 Table 1 Weighting network response at the 6.3 kHz peak (14.12.11 network) 12.2 dB (+/-0 dB) 12.2 dB 0 dB
IEC 60268-3:2013 (14.12.9) DIM of the 15 kHz / 3.15 kHz signal (Table 2, 9 products) 0.168819 (+/-0.0001) 0.168819 0
Bendat & Piersol, Random Data 4e H1 recovers a known first-order IIR gain at 1 kHz 0.8954 (+/-2%) 0.8954 0
Bendat & Piersol, Random Data 4e Ordinary coherence = 1 for a noiseless LTI path 1 (+/-0.001) 1 0
AES17-2015 (6.4.2 / 5.2.7) Idle channel noise, 1 kHz -20 dBFS tone (CCIR-RMS -5.63 dB offset) -25.63 dB (+/-0.01 dB) -25.63 dB 0 dB
AES17-2015 (6.4.1) Dynamic range, full-scale reference over a -40 dBFS residual at 2 kHz 40 dB (+/-0.6 dB) 40.41 dB 0.414 dB
Calibrated spectral analysis (Bendat & Piersol): 100% (12/12)
Standard Quantity Expected (norm) Computed Δ Status
Bendat & Piersol, Random Data 4e Eq. (5.67) White-noise autospectral density = sigma^2/(fs/2) 0.000977 (+/-3%) 0.000982 0
Bendat & Piersol, Random Data 4e Eq. (8.158) PSD random error = 1/sqrt(nd) (Monte Carlo, 100 seeded records) 0.1768 (+/-6%) 0.1764 0
Bendat & Piersol, Random Data 4e Eq. (8.163) 95% chi-square confidence interval coverage (Monte Carlo) 0.95 (+/-0.025) 0.94 -0.01
Bendat & Piersol, Random Data 4e Eqs. (9.55)/(6.39) Coherent output spectrum of a known-SNR path: gamma^2 = SNR/(1+SNR) 0.7191 (+/-0.03) 0.7255 0.006
Closed-form power-law slope (10*lg(2) dB/octave per unit exponent) Pink-noise PSD slope over 20 Hz - 20 kHz, dB/octave -3.0103 dB/oct (+/-0.05 dB/oct) -3.0116 dB/oct -0.001 dB/oct
IEC 60268-1:1985 Clause A2.1 / Table AII 5 ms burst of 5 kHz tone at 48 kHz: gate RMS = A/sqrt(2) (integral periods) 0.707107 (+/-0) 0.707107 0
Harris 1978 closed form (DFT-even Hann) Hann window ENBW = n*sum(w^2)/sum(w)^2 = 3/2 exactly 1.5 (+/-0) 1.5 0
Constant-power 1/n-octave kernel (closed form) 1/3-octave smoothed line level = Pdf/(f0(2^(1/6)-2^(-1/6))) 0.021592 (+/-1e-07%) 0.021592 0
Percival & Walden 1993, Table 382 Slepian taper concentration lambda_14(31, 8/31), quadruple-precision table 0.92943822082 (+/-0.000000000001) 0.92943822082 0
Percival & Walden 1993, Section 7.2 / Eq. (333) Multitaper white-noise density = sigma^2/(fs/2), NW=4, K=7 tapers 0.000977 (+/-3%) 0.000963 0
Percival & Walden 1993, Eq. (369a) tone calibration Multitaper 'spectrum' scaling reads a sinusoid peak at A^2/2 4.5 (+/-0.01%) 4.500003 0
Percival & Walden 1993, Eq. (370b) Adaptive multitaper dof -> 2K on white noise (weights -> uniform) 14 (+/-2%) 13.9847 -0.015
Multiple-input coherence (Bendat & Piersol): 100% (5/5)
Standard Quantity Expected (norm) Computed Δ Status
Bendat & Piersol, Random Data 4e Problem 7.2 / Eqs. (7.86)/(7.94) Conditioned coherent output of the 2nd input abs(G2y.1)^2/G22.1 = 4/3 exactly 1.333333333 (+/-0) 1.333333333 0
Bendat & Piersol, Random Data 4e Problem 7.2 / Eqs. (7.87)/(7.116) Partial coherence gamma^2_2y.1 = 2/15 and multiple coherence = 0.7 0.7 (+/-0) 0.7 0
Bendat & Piersol, Random Data 4e Eq. (7.35) with Eqs. (6.40)/(6.41) Multiple coherence of a known-SNR system: gamma^2_{y:x} = SNR/(1+SNR) 0.8889 (+/-0.03) 0.8913 0.002
Bendat & Piersol, Random Data 4e Eq. (7.117) Uncorrelated inputs: multiple coherence = sum of ordinary coherences 0 (+/-0.02) -0.0098 -0.01
Bendat & Piersol, Random Data 4e Eqs. (7.88)/(7.121) Output-power decomposition Gyy = sum of Gvi + Gnn (exact) 0 (+/-0.000000000001) 0 0
Time-frequency analysis (Bendat & Piersol): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
Bendat & Piersol, Random Data 4e Eq. (12.173) Spectrogram of an on-bin tone reads its mean square A^2/2 in every column 2 (+/-1e-07%) 2 0
Parseval + COLA identity (Hann taper, 75% overlap) Time-integrated STFT power = time-domain energy of an interior burst 0.236151 (+/-1e-10%) 0.236151 0
Bendat & Piersol, Random Data 4e Eqs. (11.128)-(11.130) Zoom FFT tone amplitude = demodulate-decimate-DFT chain, machine precision 0.7 (+/-1e-10%) 0.7 0
Correlation, time delay and envelope (B&P / Knapp & Carter): 100% (7/7)
Standard Quantity Expected (norm) Computed Δ Status
Bendat & Piersol, Random Data 4e Eq. (5.21) Cross-correlation peak of a 16-sample pure delay, samples 16 (+/-0.001) 16 0
Knapp & Carter 1976, Table I (PHAT) + sub-sample interpolation GCC-PHAT estimate of an exact 12.25-sample fractional delay, samples 12.25 (+/-0.005) 12.2483 -0.002
Bendat & Piersol, Random Data 4e Eq. (5.101) Cross-spectrum phase-slope estimate of the same fractional delay 12.25 (+/-0.001) 12.2498 0
Bendat & Piersol, Random Data 4e Eq. (8.120) BLWN autocorrelation coefficient at 3 samples vs sin(2piBt)/(2piBt) -0.1559 (+/-0.02) -0.1666 -0.011
Bendat & Piersol, Random Data 4e Example 8.5 Random error of the correlation peak: B=100 Hz, T=5 s, M/S=N/S=10 0.35 (+/-0.001) 0.3493 -0.001
Bendat & Piersol, Random Data 4e Table 13.1 Hilbert transform of cos recovers sin: max interior error 0 (+/-0) 0 0
Bendat & Piersol, Random Data 4e Eq. (13.27) Envelope of an AM waveform recovers 1 + mcos(2pifm*t) exactly 0 (+/-0) 0 0
Cepstrum, liftering and envelope spectrum (Havelock / B&P): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
Havelock 2008 Ch. 27 Fig. 21 + Mercator series of ln(1+ae^{-jtheta}) Power-cepstrum height at the echo delay = reflection coefficient a 0.4 (+/-0) 0.4 0
Havelock 2008 Ch. 87 Eq. (14): complex cepstrum, series term n = 2 Second rahmonic of a reflection a = 0.4 equals -a^2/2 -0.08 (+/-0) -0.08 0
Bendat & Piersol, Random Data 4e Sec. 13.3 (Fig. 13.11) Envelope-spectrum line of an AM tone (A0 = 2, m = 0.35) at fm 0.7 (+/-0.002) 0.7 0
Time synchronous averaging (McFadden 1987): 100% (5/5)
Standard Quantity Expected (norm) Computed Δ Status
McFadden 1987 Eq. 8 / Eq. 9: comb filter |C(f)| at a harmonic k/T Comb-filter tooth height at a harmonic equals unity (any N) 1 (+/-0) 1 0
McFadden 1987 Eq. 8: comb filter one quarter-order from a tooth, N = 2 Comb-filter magnitude = 1/sqrt(2) at order 0.25 0.70710678 (+/-0) 0.70710678 0
McFadden 1987 Sec. 4 (Fig. 5): node selection, tone at 32.05 orders N = 20 places a comb node on 32.05 orders (|C| = 0), not the power-of-2 N = 32 0 (+/-0.0000000001) 0 0
McFadden 1987 Eq. 5: exact recovery, integer samples per period Noiseless periodic waveform (M = 256) recovered to machine precision 0 (+/-0.0000000001) 0 0
McFadden 1987 Sec. 1: asynchronous-noise variance reduced by 1/N Residual noise std of the average falls as sigma/sqrt(N), N = 64 0.125 (+/-15%) 0.12414 -0.001
Data qualification and Rice statistics (Bendat & Piersol): 100% (8/8)
Standard Quantity Expected (norm) Computed Δ Status
Bendat & Piersol, Random Data 4e Example 4.4 Reverse arrangements of the 20-observation sequence 86 (+/-0) 86 0
Bendat & Piersol, Random Data 4e Table A.6 Lower percentage point A(20; 0.975) at alpha = 0.05 64 (+/-0) 64 0
Bendat & Piersol, Random Data 4e Table A.6 Upper percentage point A(20; 0.025) at alpha = 0.05 125 (+/-0) 125 0
Wald & Wolfowitz 1940 exact run distribution Runs acceptance region for n1 = n2 = 10, alpha = 0.05: lower point 6 (+/-0) 6 0
Wald & Wolfowitz 1940 exact run distribution Runs acceptance region for n1 = n2 = 10, alpha = 0.05: upper point 15 (+/-0) 15 0
Bendat & Piersol, Random Data 4e Example 5.13 / Eq. (5.195) Zero-crossing rate of bandlimited noise (fc = 1 kHz, B = 400 Hz) 2013 (+/-1%) 2013 -0.551
Bendat & Piersol, Random Data 4e Example 5.12 Apparent frequency of low-pass noise (B = 2 kHz) = 0.577 B 1155 (+/-1%) 1159 3.911
Bendat & Piersol, Random Data 4e Example 5.14 / Eq. (5.206) Prob[positive peak > 4 sigma] of a narrow bandwidth record 0.000335 (+/-0.00001) 0.000334 0
Underwater acoustics (ISO 18405/17208/18406): 100% (6/6)
Standard Quantity Expected (norm) Computed Δ Status
ISO 18405:2017 / ISO 18406 Formula 7 Sound pressure level of a synthetic tone, dB re 1 µPa 123.0103 (+/-0.0001) 123.0103 0
ISO 18405:2017 / ISO 18406 Formulae 3-4 Sound exposure level of a 2 s tone, dB re 1 µPa²·s 120 (+/-0.001) 120 0
ISO 18406:2017 (6.4.2.1.3) Peak sound pressure level of a known waveform, dB re 1 µPa 129.5424 (+/-0.0001) 129.5424 0
ISO 17208-1:2016 Radiated noise level from RMS pressure and distance, dB re 1 µPa·m 46.0206 (+/-0.0001) 46.0206 0
ISO 17208-2:2019 (Formula 3) Lloyd's-mirror surface correction ΔL at a known k·d_s -3.5211 (+/-0.0001) -3.5211 0
ISO 18406:2017 (Formulae 8-9) Cumulative SEL of N identical strikes = SEL_ss + 10·lg(N) 196.9897 (+/-0) 196.9897 0
Underwater sound propagation (transmission loss): 100% (16/16)
Standard Quantity Expected (norm) Computed Δ Status
Mackenzie (1981) nine-term equation Speed of sound at 25 °C, 35 ‰, 1000 m (canonical check value), m/s 1550.744 m/s (+/-0.01 m/s) 1550.744 m/s 0 m/s
UNESCO/Chen-Millero vs Mackenzie Sound-speed agreement at 10 °C, 35 ‰, 1000 m (cross-model), m/s 1506.264 m/s (+/-1 m/s) 1506.524 m/s 0.261 m/s
Del Grosso (1974) vs Mackenzie Sound-speed agreement at 10 °C, 35 ‰, 1000 m (cross-model), m/s 1506.264 m/s (+/-1 m/s) 1506.313 m/s 0.049 m/s
Spherical spreading 20·lg(R) Geometrical spreading loss at R = 1000 m, dB 60 dB (+/-0 dB) 60 dB 0 dB
Thorp (1967) absorption Volume absorption α at 10 kHz (cold deep water), dB/km 1.1498 dB/km (+/-0 dB/km) 1.1498 dB/km 0 dB/km
Ainslie-McColm (1998) vs Francois-Garrison (1982) Absorption agreement at 10 kHz, 10 °C, 35 ‰, 0 m, pH 8, dB/km 0.9626 dB/km (+/-0.0963 dB/km) 0.9866 dB/km 0.024 dB/km
Francois-Garrison (1982) Part II Table IV Absorption α at 100 kHz, 10 °C, 35 ‰, 0 m, pH 8 (printed value), dB/km 33.6 dB/km (+/-0.05 dB/km) 33.63 dB/km 0.03 dB/km
Del Grosso refit (Wong-Zhu 1995 Table IV) c(t90 = 20 °C, S = 35, P = 500 bar) vs the printed check table, m/s 1603.679 m/s (+/-0.001 m/s) 1603.679 m/s 0 m/s
Wales-Heitmeyer (2002) ensemble spectrum Merchant-ship source PSD at 100 Hz (printed equation), dB re 1 µPa²/Hz 158.45 dB (+/-0.001 dB) 158.45 dB 0 dB
Passive sonar equation (Urick/Etter) Figure of merit SL − (NL − DI) − DT, dB 85 dB (+/-0 dB) 85 dB 0 dB
Seabed reflection (Rayleigh, normal incidence) Bottom loss at 90° grazing, sand ρ=1900 c=1650 over water, dB 9.0506 dB (+/-0 dB) 9.0506 dB 0 dB
Wenz wind noise (rule of fives) Wind spectrum level at 1 kHz, 5 kn (canonical anchor), dB re 1 µPa²/Hz 51.0206 dB (+/-0.0001 dB) 51.0206 dB 0 dB
Mellen thermal noise Thermal spectrum level at 50 kHz, 16.85 °C (physical), dB re 1 µPa²/Hz 19.3426 dB (+/-0 dB) 19.3426 dB 0 dB
JOMOPANS-ECHO ship source level Bulker V=13.5 kn L=211 m band level at 1 kHz (File S1 oracle), dB re 1 µPa m 161.394 dB (+/-0.01 dB) 161.394 dB 0 dB
UNESCO sound speed (EOS-80 canonical value) SVEL(S = 40, T68 = 40 °C, P = 1000 bar) vs Fofonoff & Millard 1983, m/s 1731.995 m/s (+/-0.02 m/s) 1732.004 m/s 0.009 m/s
Medwin (1975) sound speed (Ainslie Eqs. 1.2-1.4) ∂c/∂T at 10 °C, neglecting the bracketed terms, m/s per °C 3.5 m/s per °C (+/-0.001 m/s per °C) 3.5 m/s per °C 0 m/s per °C
Underwater propagation regimes (Weston flux theory): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
Ainslie (2010) Table 9.1, medium sand Reflection loss gradient η from Equation (9.51), Np/rad 0.28 Np/rad (+/-0.005 Np/rad) 0.278 Np/rad -0.002 Np/rad
Ainslie (2010) Table 9.1, mud Reflection loss gradient η from Equation (9.53) at 1 Hz, Np/rad 0.021 Np/rad (+/-0.0005 Np/rad) 0.02073 Np/rad 0 Np/rad
Weston cylindrical spreading vs normal modes Range-averaged TL in an ideal 100 m waveguide at 100 Hz, 20-30 km, dB 58.949 dB (+/-1 dB) 58.399 dB -0.55 dB
Marine-mammal auditory weighting (NMFS / Southall): 100% (4/4)
Standard Quantity Expected (norm) Computed Δ Status
NMFS (2018) Appendix D worked example Weighting factor adjustment W(1 kHz) for high-frequency cetaceans, dB -37.55 dB (+/-0.01 dB) -37.545 dB 0.005 dB
NMFS (2024) v3.0 Table 5, otariid C C recomputed as the peak of W(f) for the OW row (printed 1.37, corrected 1.36), dB 1.3643 dB (+/-0.0005 dB) 1.3643 dB 0 dB
Ainslie (2010) Equation (11.159), orca audiogram Hearing threshold at 50 kHz (third branch), dB re 1 µPa 51.2 dB (+/-0.05 dB) 51.199 dB -0.001 dB
Ainslie (2010) §11.4.6, orca versus salmon Noise-limited figure of merit (SL + TS − NL + AG − DT)/2, dB re m² 51 dB (+/-0 dB) 51 dB 0 dB
Underwater numerical propagation (modes / rays / PE): 100% (4/4)
Standard Quantity Expected (norm) Computed Δ Status
Normal modes vs ideal waveguide Fundamental horizontal wavenumber kr1 at 20 Hz, 100 m (analytic), rad/m 0.077662 rad/m (+/-0.0001 rad/m) 0.077662 rad/m 0 rad/m
Normal modes vs image-source oracle Absolute TL at 1 km in the ideal waveguide (converged image sum), dB 48.238 dB (+/-0.02 dB) 48.239 dB 0.001 dB
Ray tracing vs linear gradient Turning depth of a 10° ray, c = 1500 + 0.05z (circular arc), m 462.8 m (+/-1 m) 462.8 m 0 m
Parabolic equation vs free field PE transmission loss at 2 km, homogeneous medium (spherical spreading), dB 66.021 dB (+/-0.1 dB) 66.021 dB 0 dB
Aircraft noise (ICAO Annex 16 / IEC 61265): 100% (15/15)
Standard Quantity Expected (norm) Computed Δ Status
ECAC Doc 29 noise fraction (half path) Finite-segment correction ΔF for a perpendicular foot at the segment start, dB -3.0103 dB (+/-0.001 dB) -3.0103 dB 0 dB
ECAC Doc 29 single-event chain SEL of a long level flyover vs the infinite-path limit LE∞ + ΔI − Λ, dB 83.444 dB (+/-0.01 dB) 83.444 dB 0 dB
ECAC Doc 29 impedance adjustment (standard atmosphere) Acoustic-impedance adjustment of NPD data at 15 °C / 101.325 kPa (Eq. 4-6/4-7), dB 0.074 dB (+/-0.0005 dB) 0.0741 dB 0 dB
ECAC Doc 29 reference workbook (segment Λ) Lateral attenuation of a climbing segment vs the ECAC Vol 3 Part 1 workbook, dB 6.3769 dB (+/-0.01 dB) 6.3769 dB 0 dB
ECAC Doc 29 start-of-roll directivity (jet) ΔSOR behind a takeoff ground-roll segment vs the Vol 3 Part 1 workbook, dB 0.3196 dB (+/-0.01 dB) 0.3196 dB 0 dB
ECAC Doc 29 start-of-roll directivity (turboprop) ΔSOR behind a takeoff ground-roll segment (turboprop, Eq. 4-24b), dB 1.0943 dB (+/-0.01 dB) 1.0944 dB 0 dB
ECAC Doc 29 workbook event assembly (JETFDS/R03, behind SOR) Energy sum of the reference per-segment SELs vs the B-1 event total, dB 74.73 dB (+/-0.01 dB) 74.733 dB 0.003 dB
SAE ARP 5534 band-attenuation continuity SAE-Method δ_B at the 150 dB branch split (Eq. 7 vs Eq. 8), dB 123.95 dB (+/-0.01 dB) 123.953 dB 0.003 dB
EASA ANP database round-trip Interpolated NPD level at a tabulated node vs the published ANP value, dB 98.8 dB (+/-0 dB) 98.8 dB 0 dB
ECAC Doc 29 NPD interpolation Log-linear NPD level at the log-midpoint distance (Eq. 4-4), dB 97 dB (+/-0 dB) 97 dB 0 dB
SAE ARP 5534 pure-tone coefficient (ISO 9613-1) Mid-band α at 1 kHz, 25 °C, 70 % RH, 101.325 kPa, dB/m 0.006186 dB/m (+/-0 dB/m) 0.006186 dB/m 0 dB/m
ICAO Annex 16 Vol. I App. 2 Table A2-3 Perceived noisiness at SPL(b), 1 kHz band, in noys 1 (+/-0) 1 0
ICAO Doc 9501 ETM Vol. I Table 3-7 Tone correction of the turbofan example, dB 2 (+/-0) 2 0
ICAO Doc 9501 ETM Vol. I Table 4-4 Integrated-method reference EPNL, EPNdB 92.619 EPNdB (+/-0.01 EPNdB) 92.619 EPNdB 0 EPNdB
IEC 61265:1995 Table 1 Directional-response tolerance at 4 kHz / 90°, dB 2 dB (+/-0 dB) 2 dB 0 dB
Rotorcraft noise (ECAC Doc 32 / NORAH2): 100% (12/12)
Standard Quantity Expected (norm) Computed Δ Status
ECAC Doc 32 atmospheric attenuation (Table 4) ΔLa over a 1 km excess path at 1 kHz vs the NORAH2 guidance Table 4, dB 6.3 dB (+/-0.2 dB) 6.186 dB -0.114 dB
ECAC Doc 32 spherical spreading ΔLs at ten times the 60 m hemisphere reference distance (Eq. 24), dB -20 dB (+/-0 dB) -20 dB 0 dB
ECAC Doc 32 ground effect (rigid limit) ΔLg over a rigid surface at grazing incidence tends to +6 dB (Eq. 29), dB 6 dB (+/-1 dB) 6 dB 0.002 dB
ECAC Doc 32 propagation chain (NORAH2 prototype) LA of a single-hemisphere emission vs the NORAH2 prototype single-event history (R22 approach, 223.66 m slant), dB(A) 55.87 dB(A) (+/-0.1 dB(A)) 55.886 dB(A) 0.016 dB(A)
ECAC Doc 32 flight-condition interpolation (NORAH2 Eq. 8) Distance-scaled triangle blend of three uniform hemispheres, hand-checked, dB 97.0367 dB (+/-0.001 dB) 97.0364 dB 0 dB
ECAC Doc 32 flight-path kinematics (Eq. 17) Airspeed of a straight climbing track, 40 m/s ground speed at a 5° path angle, m/s 40.15279 m/s (+/-0.0001 m/s) 40.15279 m/s 0 m/s
ECAC Doc 32 retarded time (Eq. 22) Recorded-time delay at 100 m slant distance, r/c with c = 346.1 m/s, s 0.288934 s (+/-0.00001 s) 0.288934 s 0 s
ECAC Doc 32 single event (Eq. 27) SEL − LASmax of a constant-speed level flyover, 10·lg(π·d/V) closed form, dB 7.982 dB (+/-0.1 dB) 7.942 dB -0.04 dB
NORAH2 guidance mean ground plane (Eq. 36-40) Intercept of the plane fitted to a symmetric 20 m roofline, hand-checked, m 10 m (+/-0 m) 10 m 0 m
NORAH2 guidance mean flow resistivity (Eq. 41) Log-average of equal 1e4 and 1e6 Pa·s/m2 halves, hand-checked, Pa·s/m2 100000 Pa·s/m² (+/-0 Pa·s/m²) 100000 Pa·s/m² 0 Pa·s/m²
NORAH2 guidance diffraction at grazing (Eq. 42) Pure diffraction with the edge on the line of sight, 10·lg 3, dB 4.7712 dB (+/-0.0001 dB) 4.7712 dB 0 dB
NORAH2 guidance screening path difference (§A.4.5) Rubber-band delta over a 40 m hill, hand-checked geometry, m 4.2848 m (+/-0 m) 4.2848 m 0 m
CNOSSOS-EU road source (Directive 2002/49/EC Annex II): 100% (6/6)
Standard Quantity Expected (norm) Computed Δ Status
CIRCABC CNOSSOS-EU road emission test set Line power of the 60 committed cases of the 4 875-case published test set, 8 octave bands each, dB re 1 pW/m <= 0.01 dB on 480 published band levels (60 cases) 0.005 dB 0.005 dB
Directive (EU) 2021/1226 Annex pt (19)(a), Table F-1 Rolling and propulsion coefficients, 5 categories x 4 rows x 8 bands 160 coefficients identical 0 mismatches 0 mismatches
Directive (EU) 2021/1226 Annex pt (19)(b), Table F-4 Road-surface coefficients, 15 surfaces x 5 categories x (8 alpha + beta) 675 stored coefficients identical 0 mismatches 0 mismatches
Directive (EU) 2015/996 Appendix F, Tables F-2 and F-3 Studded-tyre and junction coefficients, unchanged since 2015 36 coefficients identical 0 mismatches 0 mismatches
Directive (EU) 2015/996 Annex II 2.2.4 / 2.2.11 Sound power at v_ref = 70 km/h under reference conditions, dB re 1 pW exactly A_R,i,m and A_P,i,m 0 dB 0 dB
Directive (EU) 2021/1226 Annex pt (8)(b) Octave-band A-weighting AWC_f,i prescribed by 2.5.5, dB 8 values identical 0 mismatches 0 mismatches
Wind-turbine noise (IEC 61400-11): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
IEC 61400-11:2012 Formula 30 Critical bandwidth about a 500 Hz tone, Hz 117.255 Hz (+/-0 Hz) 117.255 Hz 0 Hz
IEC 61400-11:2012 Formula 26 Apparent sound power level of a single band, dB re 1 pW 148.5139 dB (+/-0.0001 dB) 148.5139 dB 0 dB
IEC 61400-11:2012 Formulae 31-34 Tonal audibility of a synthetic clean tone, dB 16.38 dB (+/-0.06 dB) 16.38 dB -0.001 dB
Porous & multilayer absorbers (Mechel / Bies / Cox & D'Antonio): 100% (20/20)
Standard Quantity Expected (norm) Computed Δ Status
Bies 5e App. D Table D.1 / Mechel 2e G.11 (2) Delany-Bazley normalised Zc at X = 0.1, real part 1.3241 (+/-0) 1.3241 0
Bies 5e App. D Table D.1 / Mechel 2e G.11 (2) Delany-Bazley normalised Zc at X = 0.1, imaginary part -0.4694 (+/-0) -0.4694 0
Miki 1990 Eqs. (30)-(34) Miki normalised wavenumber at f/sigma = 0.1, real part 1.4523 (+/-0) 1.4523 0
Johnson et al. 1987 / Cox & D'Antonio 3e Eq. (6.19) JCA static viscous limit j w rho_e -> sigma, Pa s/m2 20000 Pa s/m2 (+/-0.01%) 20000 Pa s/m2 0 Pa s/m2
Mechel 2e Sect. D.3 Eq. (1) Hard-backed layer: TMM vs -j Zc cot(kd), max rel deviation 0 (+/-0) 0 0
Lossless-layer limit (Mechel 2e Sect. D.3-D.4) Air cavity over a rigid wall at lambda/4: alpha 0 (+/-0) 0 0
Mechel 2e Sect. D.5 Maximum statistical absorption of a locally reacting plane 0.951 (+/-0.001) 0.951 0
Cox & D'Antonio 3e Eq. (7.9) Membrane resonance 60/sqrt(m d), m = 5 kg/m2, d = 5 cm, Hz 120 Hz (+/-2%) 119.85 Hz -0.15 Hz
Maa 1998 Fig. 5 / Cox & D'Antonio 3e Fig. 7.28 Microperforated panel (d=t=0.2 mm, b=2.5 mm, D=6 cm): peak alpha 0.95 (+/-0.05) 0.956 0.006
Maa 1998 Eqs. (5a)/(10) MPP peak absorption vs 4r/(1+r)^2 with Maa's printed resistance 4r/(1+r)^2 = 0.949 0.956 0.007
Allard & Atalla 2e Sect. 11.3.4 (Eq. 6.90), Table 6.1 glass wool Zwikker-Kosten decoupling frequency Fd, Hz 43.27 Hz (+/-0.005 Hz) 43.271 Hz 0.001 Hz
Allard & Atalla 2e Eq. (11.55), printed p. 253 (prose limit) Limp effective density at DC = apparent total density rho_t, kg/m3 31.1809 kg/m3 (+/-0.01%) 31.1809 kg/m3 0 kg/m3
Allard & Atalla 2e Eq. (11.55), printed p. 253 (prose limit) Heavy frame recovers the rigid-frame Zc (relative deviation) 0 (+/-0.00001) 0 0
Allard & Atalla 2e printed p. 254 (Doutres et al. 2007) Limp-frame bulk-modulus limit for air, kPa 20 kPa (+/-0.3 kPa) 20.27 kPa 0.265 kPa
Allard & Atalla 2e Eq. (6.110), Table 6.1 glass wool Frame lambda/4 resonance of a 10 cm layer, Hz 459.9 Hz (+/-0.05 Hz) 459.93 Hz 0.033 Hz
Allard & Atalla 2e Sect. 6.5.4 (Biot model output), pp. 124-125 Airborne compressional branch changes root at 495 Hz 495 Hz (+/-1%) 495.9 Hz 0.9 Hz
Allard & Atalla 2e Sect. 6.5.4 (Biot model output), pp. 124-125 Frame-borne velocity ratio Re(mu_b) at 1500 Hz (see ERRATA) 0.82 (+/-2%) 0.811 -0.009
Allard & Atalla 2e Sect. 6.6.3 (Biot model output), p. 129 Surface-impedance peak of a 5,6 cm layer, Hz 860 Hz (+/-2%) 863.5 Hz 3.5 Hz
Allard & Atalla 2e Sect. 11.3.4 (rigid-frame limit) Stiff, heavy frame recovers the JCA layer (max rel deviation) 0 (+/-0.0000001) 0.0000000034 0
Allard & Atalla 2e Eq. (6.107) vs Sect. 11.5 assembly Two independent derivations of Zs (max rel deviation) 0 (+/-0.0000000001) 0 0
Slow-sound perfect absorbers (Jimenez et al. Appl. Sci. 2017): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
Jimenez et al. Appl. Sci. 2017 Eq. (9) Critical coupling: alpha at the design frequency (300 Hz, normal) 1 (+/-0.001) 1 0
Poiseuille limit (Stinson 1991) Slit: j w rho_s -> 12 eta / h^2 as w -> 0 (h = 1.2 mm) 153.3 Pa s/m2 (+/-0.1%) 153.3 Pa s/m2 0 Pa s/m2
Poiseuille limit (Stinson 1991) Square duct: j w rho -> 28.454 eta / w^2 as w -> 0 (w = 3 mm) 58.2 Pa s/m2 (+/-0.2%) 58.2 Pa s/m2 0 Pa s/m2
Program loudness (ITU-R BS.1770 / EBU R 128): 100% (8/8)
Standard Quantity Expected (norm) Computed Δ Status
ITU-R BS.1770-5 Annex 1 997 Hz sine at 0 dB FS on the left channel, LKFS -3.01 LKFS (+/-0.01 LKFS) -3.01 LKFS 0 LKFS
EBU Tech 3341:2023 Table 1 case 1 Integrated loudness of the -23 dBFS stereo sine, LUFS -23 LUFS (+/-0.1 LUFS) -22.99 LUFS 0.007 LUFS
EBU Tech 3341:2023 Table 1 case 5 Gated integrated loudness of the -26/-20/-26 dBFS steps, LUFS -23 LUFS (+/-0.1 LUFS) -22.98 LUFS 0.021 LUFS
EBU Tech 3341:2023 Table 1 case 6 Integrated loudness of the 5.0-channel sine (Table 3 weights), LUFS -23 LUFS (+/-0.1 LUFS) -23.02 LUFS -0.016 LUFS
EBU Tech 3341:2023 Table 1 case 15 True-peak level of the fs/4 sine at 0.5 FFS, dBTP -6 dBTP (+0.2/-0.4 dB) -6.02 dBTP -0.015 dBTP
EBU Tech 3341:2023 Table 1 case 19 True-peak level of the fs/4 sine at 1.41 FFS, dBTP 3 dBTP (+0.2/-0.4 dB) 3 dBTP 0.001 dBTP
EBU Tech 3342:2023 Table 1 case 1 Loudness range of the -20/-30 dBFS tone steps, LU 10 LU (+/-1 LU) 10 LU 0 LU
EBU Tech 3342:2023 Table 1 case 3 Loudness range of the -40/-20 dBFS tone steps, LU 20 LU (+/-1 LU) 20 LU 0 LU
2D FDTD wave simulation (Attenborough & Van Renterghem 2021, Ch. 4): 100% (4/4)
Standard Quantity Expected (norm) Computed Δ Status
Rigid rectangular box eigenfrequency Mode (1,1) of a 1.0 x 0.7 m rigid box, f = (c/2)*sqrt(1/lx^2 + 1/ly^2), Hz 299.06 Hz (+/-1.5 Hz) 298.91 Hz -0.153 Hz
Free-field pulse arrival delay Probe-to-probe delay of a pulse over 0.6 m of air, (r2 - r1)/c, ms 1.749 ms (+/-0.05 ms) 1.756 ms 0.007 ms
2D Kirchhoff-Helmholtz NTFF: monopole directivity Far-field pattern ripple of an enclosed line source, dB 0 dB (+/-0.2 dB) 0.044 dB 0.044 dB
2D Kirchhoff-Helmholtz NTFF: monopole level NTFF far-field level vs the 2D Green function A sqrt(2/(pi k)), dB 0 dB (+/-0.3 dB) 0.106 dB 0.106 dB
Swept-sine distortion & phase utilities (Farina / Novak): 100% (7/7)
Standard Quantity Expected (norm) Computed Δ Status
Farina 2000 / Novak et al. 2015 (Chebyshev identity) 3rd-harmonic response H3 magnitude of a cubic polynomial, re a3/4 0.05 (+/-0.0005) 0.05001 0
Novak et al. 2015, JAES 63(10), Eqs. 18/49 Synchronized-sweep phase of H3 (Chebyshev: -sin(3wt)), rad 3.1416 rad (+/-0.005 rad) 3.1411 rad 0 rad
Farina 2000, AES 108th Conv. (THD from one sweep) THD(1 kHz) of the polynomial vs sqrt((a2/2)^2+(a3/4)^2)/(1+3a3/4) 0.06149 (+/-0.001) 0.06159 0
Farina 2000 (distortion rejected from the linear IR) THD floor of a purely linear path (gain 0.5), max over 100-2000 Hz 0 (+/-0.001) 0.00033 0
Bendat & Piersol, Random Data 4e Sec. 13.1.4 (Hilbert relation) Min-phase reconstruction of a strictly min-phase biquad, max err, rad 0 rad (+/-0 rad) 0 rad 0 rad
First-order allpass closed form (1-a^2)/(1+2a cos w+a^2) Group delay of the a = 0.5 allpass at w = pi/2, samples 0.6 (+/-0.00001) 0.6 0
All-pass decomposition of a pure latency (B&P Sec. 13.1.4) Excess group delay of a biquad delayed 7.25 samples, samples 7.25 (+/-0) 7.25 0
Spherical ground & barriers (Attenborough / Salomons / Bies): 100% (7/7)
Standard Quantity Expected (norm) Computed Δ Status
Attenborough 2e Eq. (2.40c) (spherical Q, hard-ground limit) abs(Q) as Z grows large (Rp -> 1 so (1 - Rp) -> 0 and Q -> 1) 1 (+/-0.000001) 1 0
Salomons 2001 Sec. 3.4 (two-ray field over a rigid ground) dL enhancement at small path difference (constructive, +6 dB) 6.0206 dB (+/-0.1 dB) 6.0205 dB 0 dB
Salomons 2001 Eq. (D.59) (plane-wave Rp, grazing incidence) Re(Rp) at grazing (hs, hr -> 0, cos(theta) -> 0 so Rp -> -1) -1 (+/-0.001) -1 0
Salomons 2001 Fig. D.3 (grassland ground dip, sigma = 200 kPa s/m2) Minimum dL for hs = hr = 2 m, r = 100 m (dip near 395 Hz), dB -12.7 dB (+/-0.3 dB) -12.72 dB -0.022 dB
Bies 5e Eq. (5.138) (Kurze-Anderson, N -> 0) Barrier attenuation at the shadow boundary N = 0 5 dB (+/-0 dB) 5 dB 0 dB
Bies 5e Eq. (5.138) (Kurze-Anderson, large-N slope) Delta(N=10) - Delta(N=1) vs the 10 lg(10) = 10 dB decade growth 10 dB (+/-0.5 dB) 9.8845 dB -0.116 dB
Attenborough 2e Eqs. (9.19)-(9.20) (rigid half-plane, shadow boundary) Exact thin-screen insertion loss at grazing (field halved, 6 dB) 6.0206 dB (+/-0.6 dB) 5.7932 dB -0.227 dB
Panel & aperture sound insulation (Bies / Hopkins / Cremer): 100% (17/17)
Standard Quantity Expected (norm) Computed Δ Status
Bies 5e Eq. 7.40 (mass law) 6 dB per octave (500 -> 1000 Hz) 6.0206 dB (+/-0.01 dB) 6.02 dB -0.001 dB
Bies 5e Eq. 7.40 (mass law) 6 dB per doubling of mass 6.0206 dB (+/-0.01 dB) 6.02 dB -0.001 dB
Bies 5e Eq. 7.42 (field incidence) One-third-octave correction 5.5 dB 5.5 dB (+/-0.001 dB) 5.5 dB 0 dB
Hopkins Eq. 2.201 / Bies Eq. 7.3 Coincidence frequency, 6 mm glass 2079 Hz (+/-3%) 2107.3639 Hz 28.364 Hz
Cremer Table 5.1 Thin-plate point impedance Z = 8 sqrt(B' m'') 2529.8221 N.s/m (+/-0 N.s/m) 2529.8221 N.s/m 0 N.s/m
Cremer Table 5.1 Infinite-beam mobility phase -45 deg -45 deg (+/-0 deg) -45 deg 0 deg
Hopkins Eq. 2.229 (Leppington/Maidanik) Radiation efficiency at f = 2 fc 1.4142 (+/-0) 1.4142 0
Bies Eq. 7.62 / Hopkins Eq. 4.73 Mass-air-mass resonance f0, empty cavity 76.9484 Hz (+/-0.5%) 76.8521 Hz -0.096 Hz
Bies Eq. 7.64 (double wall) Below f0 = mass law of the combined mass 11.6144 dB (+/-0 dB) 11.6144 dB 0 dB
Hopkins Eq. 4.92 (composite) 1 % open area caps R at 10 lg(S/Sa) 20 dB (+/-0.05 dB) 19.9996 dB 0 dB
Vigran Building Acoustics Eq. (3.109), printed p. 96 Flat 1 mm steel plate 1 m x 1 m, f(1,1) 4.9 Hz (+/-0.05 Hz) 4.93 Hz 0.033 Hz
Vigran Eqs. (3.113)/(3.115), printed p. 96 Corrugated 1 mm steel plate (H = 10 mm, L = 100 mm), f(2,2) 102 Hz (+/-0.1 Hz) 102.09 Hz 0.092 Hz
Bies 5e Eq. (7.59) / Vigran Eq. (6.112) Heckl coincidence-branch constant, dB (rho c = 414) -13.2 dB (+/-0.02 dB) -13.217 dB -0.017 dB
Bies 5e Eq. (7.60) / Vigran Eq. (6.112) Heckl recovery-branch constant, dB (rho c = 414) -23 dB (+/-0.2 dB) -23.16 dB -0.16 dB
Vigran Eq. (6.111) / Bies Eq. (7.38) Orthotropic diffuse integral below fc1 vs its exact mass-law form 6.287723 dB (+/-0.000001 dB) 6.287723 dB 0 dB
Hopkins Table A2, printed p. 608 h.fc products of 25 building-material rows, worst deviation 0 m.Hz (+/-0.06 m.Hz) 0.0476 m.Hz 0.048 m.Hz
Hopkins Eq. 4.99/4.101 (Gomperts slit) Transmission maximum at first resonance 1544.9615 Hz (+/-15 Hz) 1542.9615 Hz -2 Hz
Bending-wave plate-junction transmission (Cremer / Craik / Hopkins): 100% (6/6)
Standard Quantity Expected (norm) Computed Δ Status
Hopkins Eq. 5.12 (identical plates) X-junction corner tau12(0 deg) = 1/8 0.125 (+/-0) 0.125 0
Hopkins Eqs 5.12 + 5.6 (identical plates) X-junction corner angular average = 1/12 0.0833 (+/-0) 0.0833 0
Hopkins Eqs 5.12 + 5.6 (identical plates) L-junction corner angular average = 1/3 0.3333 (+/-0) 0.3333 0
Hopkins Eq. 5.14 (identical plates) In-line junction tau12(0 deg) = 1 1 (+/-0) 1 0
Hopkins Eq. 5.7 (SEA consistency) X-junction reciprocity tau_bar_12 / tau_bar_21 = chi 1.5 (+/-0) 1.5 0
Hopkins Eq. 5.116 (identical plates, fc_j = f_ref) X-junction vibration reduction index = 10 lg(12) 10.7918 dB (+/-0 dB) 10.7918 dB 0 dB
Atmospheric refraction (Salomons rays / GFPE): 100% (3/3)
Standard Quantity Expected (norm) Computed Δ Status
Salomons Sec. 4.4 (ray turning height, linear profile) Turning height of a 10 deg ray vs Rc(1 - cos theta0) (circular arc), m 26.457 m (+/-0.1 m) 26.457 m 0 m
Salomons Eq. (3.4) (GFPE vs spherical-wave ground effect, homogeneous) PE relative level at 500 m over grassland vs Weyl-Van der Pol, dB -16.368 dB (+/-0.5 dB) -16.402 dB -0.035 dB
Salomons Eq. (3.4) (GFPE hard ground vs two-ray, homogeneous) PE relative level at 500 m over a rigid ground vs the coherent two-ray, dB 5.997 dB (+/-0.6 dB) 5.593 dB -0.405 dB
Electroacoustics: 100% (9/9)
Standard Quantity Expected (norm) Computed Δ Status
Beranek & Mellow 2e Eq. (13.117) Piston resistance R1(x) = 1 - 2 J1(x)/x at x = 2ka = 2 0.423275 (+/-0.00001) 0.423275 0
Beranek & Mellow 2e Eq. (13.118) Piston reactance X1(x) = 2 H1(x)/x at x = 2ka = 2 0.646764 (+/-0.00001) 0.646764 0
Beranek & Mellow 2e Eq. (13.117) (low-frequency limit) R1 -> (ka)^2/2 as ka -> 0 (x = 0.02, ka = 0.01) 0.00005 (+/-0.01%) 0.00005 0
Beranek & Mellow 2e Eq. (4.151) Radiation mass M = 8 rho a^3 / 3 (a = 0.1 m, rho = 1.206) 0.003216 kg (+/-0 kg) 0.003216 kg 0 kg
Beranek & Mellow 2e Eq. (13.102), Table 14.1 First directivity null at ka sin(theta) = 3.8317 (first zero of J1) 0 (+/-0.000001) 0 0
Beranek & Mellow 2e §4.19 (half-space baffle) Directivity index DI -> 10 lg 2 = 3.01 dB as ka -> 0 3.0103 dB (+/-0.001 dB) 3.0103 dB 0 dB
Long, Architectural Acoustics 2e, Eq. (18.21) Omnidirectional mic at Zs = -6 dB: L(H-M) <= L(H-L) - 4 dB 76 dB (+/-0 dB) 76 dB 0 dB
Long, Architectural Acoustics 2e, Eq. (18.22) Cardioid mic (DM = -2 dB) at Zs = -6 dB: L(H-M) <= L(H-L) - 2 dB 78 dB (+/-0 dB) 78 dB 0 dB
Long, Architectural Acoustics 2e, Eq. (18.23) Number-of-open-microphones correction 10 lg Nm at Nm = 4 6.0206 dB (+/-0 dB) 6.0206 dB 0 dB
Industrial noise control: 100% (22/22)
Standard Quantity Expected (norm) Computed Δ Status
Bies 5e Eq. (8.111) Expansion-chamber peak TL = 10 lg[1 + (1/4)(m - 1/m)^2], m = 4 at kL = pi/2 6.5472 dB (+/-0 dB) 6.5472 dB 0 dB
Bies 5e Eq. (8.111) Expansion-chamber trough TL = 0 at kL = pi (chamber transparent) 0 dB (+/-0 dB) 0 dB 0 dB
Bies 5e Eq. (8.44) / Example 8.1 Quarter-wave tube tuning f = c/(4 l_e), l_e = 1.516 m -> 56.6 Hz 56.6 Hz (+/-0.1 Hz) 56.6 Hz 0.003 Hz
Bies 5e Eq. (8.46) Helmholtz resonance f0 = (c/2pi) sqrt(S/(l_e V)) (S=1e-4, l_e=0.02, V=1e-3) 122.067 Hz (+/-0 Hz) 122.067 Hz 0 Hz
Bies 5e Eq. (8.73) Side-branch TL = 20 lg abs(1 + rho c/(2 Sd Zb)) (QWT branch, closed form) 0.1638 dB (+/-0 dB) 0.1638 dB 0 dB
Bies 5e Eqs. (8.141)/(8.148) (four-pole insertion loss) Insertion loss = transmission loss for the anechoic reference Zs=Zr=rho c/S 6.2498 dB (= TL) 6.2498 dB 0 dB
Bies 5e Eq. (8.275) (Wells' plenum method) Plenum TL = -10 lg[S_out(cos0/pi r^2 + (1-a)/(Sw a))] (S_out=.1,r=1,Sw=20,a=.2) 12.8541 dB (+/-0 dB) 12.8541 dB 0 dB
Bies 5e Table 8.14 (ASHRAE end reflection, flush) Duct end reflection D = 200 mm at 125 Hz = 10 dB (table node) 10 dB (+/-0 dB) 10 dB 0 dB
Long 2e Eq. 13.1 with Table 13.5 (ASHRAE 1987 fan model) Forward-curved fan at Q_REF, P_REF, peak efficiency -> K_F + C_BFI at 500 Hz 38 dB (+/-0 dB) 38 dB 0 dB
Long 2e Eq. 14.12 with Table 14.2 (Reynolds lined rectangular duct) 18 x 12 in duct, 6 ft, 1 in lining at 1 kHz -> 1.77 (10/3)^0.695 6 dB 24.5203 dB (+/-0 dB) 24.5203 dB 0 dB
Long 2e Table 14.4 (ASHRAE 1995 lined flexible duct) 8 in diameter, 9 ft long -> 6/8/16/25/28/28/18 dB (table node) 0 dB (max |diff| over the 7 bands) 0 dB 0 dB
Long 2e Eq. 14.17 (branch power division) 25 per cent split with area-matched branches -> -10 lg 0.25 = 6.02 dB 6.0206 dB (+/-0 dB) 6.0206 dB 0 dB
Long 2e Table 14.9 (worked duct-borne sheet, supply path) Fan to room, 8 octave bands -> 52/42/30/18/9/-2/-2/-1 dB at the receiver 0 dB +/-1 (max |diff| over the 8 bands) 1 dB 1 dB
Long 2e Eqs. 13.27-13.33 (Reynolds diffuser self-noise) 24 x 24 in rectangular diffuser, 312 cfm, 0.05 in pd -> the 33/32/29/23/15 dB row of Table 14.9 0 dB +/-1 (max |diff| over the five bands) 0.8853 dB 0.885 dB
ASHRAE 2019 Applications Ch. 49 Table 9 Max neck velocity of a supply outlet for design RC(30) -> 2.2 m/s 2.2 m/s (+/-0 m/s) 2.2 m/s 0 m/s
Norton & Karczub 2e Eqs. 7.6/7.8/7.9 (problem 7.1 answer) 254 mm duct, steam, 200 m/s: (1,0) cut-on 812 Hz and k_x = -8.23 1/m 0 +/-1 (Hz, and 1/m x100) 0.591 0.591
Norton & Karczub 2e Eq. 7.10 (problem 7.2 answer) 0.65 x 0.4 m duct, 15 m/s: first three cut-on 264 / 428 / 503 Hz 0 Hz (max |diff| over the 3 modes) 0 Hz 0 Hz
Bies 5e Eqs. (7.103), (7.111) (enclosure, fully absorbing limit) Enclosure correction C -> 10 lg 0.3 = -5.23 dB as alpha_i -> 1 -5.2288 dB (+/-0.001 dB) -5.2288 dB 0 dB
Norton & Karczub 2e Eq. (4.101) (problem 4.21 answer) Double brick wall into an 8 x 9 x 3 m room -> NR 37.5/40.8/49.0/62.8/65.3/65.9 dB 0 dB +/-0.05 (max |diff| over the 6 bands) 0.0308 dB 0.031 dB
Norton & Karczub 2e 4.6/4.9 (problem 4.18 answer) Blower in a plant room to the operator room -> 72.3/60.4/41.4/41.0/33.8/30.7 dB 0 dB +/-0.1 (max |diff| over the 6 bands) 0.0682 dB 0.068 dB
Norton & Karczub 2e Eq. (4.115) (problem 4.16 answer) Lined compressor enclosure against NC-45 -> required TL 14.4/25.2/28.9/34.4/35.2/34.7/34.7/31.6 dB 0 dB +/-0.15 (max |diff| over the 8 bands) 0.1099 dB 0.11 dB
Norton & Karczub 2e Table 4.5 (constant-volume source power) Source in the intersection of two flat surfaces (Q = 4) -> +10 lg 4 = 6.02 dB 6.0206 dB (+/-0 dB) 6.0206 dB 0 dB
CNOSSOS-EU railway source (Directive 2002/49/EC Annex II): 100% (8/8)
Standard Quantity Expected (norm) Computed Δ Status
CIRCABC CNOSSOS-EU railway emission test set Line power of the 123 committed cases of the published test set, both source heights, 8 octave bands each, dB re 1 pW/m <= 0.01 dB on 984 published band levels (123 cases) 0.0055 dB 0.005 dB
Appendix G Tables G-1a and G-1b (roughness) Wheel roughness by brake type (3 x 32) and rail roughness by class (2 x 35), dB 166 coefficients identical 0 mismatches 0 mismatches
Directive (EU) 2021/1226 Annex pt (20)(b), Table G-2 Contact filter A3 for 5 wheel load and diameter combinations x 35 wavelengths, dB 175 coefficients identical 0 mismatches 0 mismatches
Appendix G Table G-3 (transfer functions) Track transfer (8 x 24), wheel transfer (4 x 24) and superstructure transfer (24), dB per axle 312 coefficients identical 0 mismatches 0 mismatches
Appendix G Tables G-4 to G-7 Impact roughness (35), traction (5 x 2 x 24), aerodynamic (2 x 24) and bridge (2 x 24), dB 371 coefficients identical 0 mismatches 0 mismatches
Annex II 2.3.2, formula (2.3.15) Horizontal dipole directivity along the track: 10 lg(0,01) at phi = 0 -20 dB (+/-0 dB) -20 dB 0 dB
Annex II 2.3.2, formulae (2.3.13) and (2.3.14) Aerodynamic speed law at v0 = 300 km/h reduces to Table G-6 verbatim 50 lg 2 = 15.051 dB on every band 0 dB 0 dB
Annex II 2.3.2, formula (2.3.12) Impact roughness at the tabulated joint density n_l = 0,01 per m Table G-4 verbatim 0 dB 0 dB

Tests & coverage — 47340 tests, 0 failures (✅ all green)
Python Version Tests Failures Coverage Status
macos-latest-3.13 7890 0 97.0% ✅ Passed
macos-latest-3.14 7890 0 97.0% ✅ Passed
ubuntu-latest-3.13 7890 0 97.0% ✅ Passed
ubuntu-latest-3.14 7890 0 97.0% ✅ Passed
windows-latest-3.13 7890 0 97.0% ✅ Passed
windows-latest-3.14 7890 0 97.0% ✅ Passed

Conformance harness: scripts/conformance_report.py · full CI artifacts

Every Sphinx cross-reference in the package that named a pre-4.0 module path
now names the module it points at. There were about ninety of them, nearly all
in the renderers, and two were the ones the reviewer flagged: the speech
renderers pointed at `phonometry.sti` and `phonometry.sii`, which are 3.1
aliases that warn. They are resolved from the alias table itself rather than by
hand, so the class is gone rather than the two instances. The table's own file
is left alone: naming the deprecated paths is its subject.

The release note listed STI, SII and STOI and left out STIPA and ESTOI, which
move with them and are public API of their own.

A call sketch written with a keyword placeholder, `f(level=...)`, is the same
thing as `f(...)` and the gate now reads it as one instead of running it.

The repeated axis labels in the new speech renderers become module constants,
which is what SonarCloud asked for and what the metrology split already did.
The two branches the coverage report named are now tested rather than
excused: the modulation-index axis of an STI result that does not carry the
seven octave bands, which a caller can build because the result class is
public, and the refusal to plot an exposure result that carries no per-task
contributions.
@github-actions github-actions Bot added area: electroacoustics Transducers, arrays and electroacoustic devices area: psychoacoustics Loudness, sharpness, roughness and annoyance area: room Room acoustics and reverberation labels Aug 2, 2026
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sonarqubecloud Bot commented Aug 2, 2026

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@jmrplens
jmrplens merged commit 1c66ff4 into main Aug 2, 2026
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@jmrplens
jmrplens deleted the split-speech branch August 2, 2026 01:26
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api Public API surface, naming and deprecations area: core Shared internals and cross-cutting code every domain depends on area: electroacoustics Transducers, arrays and electroacoustic devices area: hearing Audiometric thresholds, hearing loss and noise exposure area: psychoacoustics Loudness, sharpness, roughness and annoyance area: room Room acoustics and reverberation ci Workflows, linting and developer tooling conformance Standard clause coverage, reference values or errata documentation Improvements or additions to documentation errata Confirmed defect in a published standard, tracked in docs/ERRATA.md figures Generated plots, diagrams and animations i18n English and Spanish translations reports Accredited-format .report() fiches and their rendering site Documentation website validation Reference data and oracles used to check results against normative values

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