diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 6dd75a16f..e1f81509a 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -92,6 +92,13 @@ jobs:
         # step and is worthless once it is not.
         run: pnpm run check:icons
         working-directory: site
+      - name: Check the guides index lists every guide
+        # The page the Start topic offers as the map of the library is written
+        # by hand, and it had drifted to 100 of 104 links while stating 104 in
+        # the prose and in its own meta description, in both languages. Cheap,
+        # so it runs before the build rather than after it.
+        run: pnpm run check:guides
+        working-directory: site
       - name: Check EN/ES translation parity
         run: node scripts/check-i18n-parity.mjs
         working-directory: site
@@ -124,6 +131,13 @@ jobs:
         # all green.
         run: pnpm run check:sidebar
         working-directory: site
+      - name: Check the landing, the contrast and the language bar
+        # Three audits that existed and ran for nobody: the colour tokens of
+        # both themes against the contrast floor, the landing page's headings
+        # and grid at ten viewport and font-size combinations, and the
+        # behaviour of the language suggestion bar. They share one preview.
+        run: pnpm run check:visual
+        working-directory: site
       # Only the branch that publishes needs the tarball. A pull request has
       # already got what it came for once the checks above have run.
       - uses: actions/upload-pages-artifact@v5
diff --git a/docs/materials/absorbers/porous-absorbers.md b/docs/materials/absorbers/porous-absorbers.md
index e91310b3f..e0541377d 100644
--- a/docs/materials/absorbers/porous-absorbers.md
+++ b/docs/materials/absorbers/porous-absorbers.md
@@ -425,7 +425,7 @@ $|\mu_a| > 40$ above 50 Hz, and $\mu_b$ falls from 1.0 at 50 Hz to 0.82 at
 even though the printed sentence says "the ratio modulus": the model gives
 $\mu_b(1500) = 0.811 + 0.473j$, whose real part is 1.1 % from the printed
 value while its modulus, 0.939, is 14.5 % away. That is recorded in
-[Errata](/phonometry/reference/errata/), along with the parameter sweep that
+[Errata](../../ERRATA.md), along with the parameter sweep that
 fails to bring $|\mu_b|$ anywhere near 0.82. The impedance peak of the book's
 thinner sample is printed as 860 Hz and comes out at 863.5 Hz under the
 $\mathrm{Im}(Z_s)$ peak rule. Everything else, including the whole
diff --git a/scripts/api_taxonomy.py b/scripts/api_taxonomy.py
index ea1d73abf..4d96b6928 100644
--- a/scripts/api_taxonomy.py
+++ b/scripts/api_taxonomy.py
@@ -416,7 +416,7 @@ def module_section(module: str) -> Section:
 
 
 def _parent_subpackage(module: str) -> str:
-    """``phonometry.signals.levels`` -> ``signal``; top level -> ``""``."""
+    """``phonometry.signals.levels`` -> ``signals``; top level -> ``""``."""
     parts = module.split(".")
     return parts[1] if len(parts) > 2 else ""
 
diff --git a/site/package.json b/site/package.json
index 5105ce5cc..daca53d40 100644
--- a/site/package.json
+++ b/site/package.json
@@ -4,20 +4,22 @@
   "version": "1.0.0",
   "private": true,
   "scripts": {
-    "prebuild": "node scripts/stage-media.mjs && node scripts/copy-llms.mjs",
-    "postbuild": "node scripts/add-sitemap-lastmod.mjs && node scripts/fix-redirect-doctype.mjs && node scripts/optimize-images.mjs && node scripts/emit-page-markdown.mjs",
+    "build": "astro build",
+    "check:guides": "node scripts/check-guides-index.mjs",
     "check:i18n": "node scripts/check-i18n-parity.mjs",
+    "check:icons": "node scripts/icon-sheet.mjs --check",
     "check:math": "node scripts/check-math-render.mjs",
     "check:sidebar": "node scripts/with-preview.mjs -- node scripts/check-sidebar.mjs",
+    "check:visual": "node scripts/with-preview.mjs -- sh -c 'node scripts/check-contrast.mjs && node scripts/check-home-headings.mjs && node scripts/check-lang-suggest.mjs'",
     "dev": "astro dev",
-    "build": "astro build",
-    "identity:sync": "node scripts/sync-identity.mjs",
-    "preview": "astro preview",
     "html-validate": "html-validate 'dist/**/*.html'",
-    "pa11y": "node scripts/with-preview.mjs -- ./node_modules/.bin/pa11y-ci",
-    "lighthouse": "node scripts/lighthouse-audit.mjs",
     "icons:sheet": "node scripts/icon-sheet.mjs",
-    "check:icons": "node scripts/icon-sheet.mjs --check"
+    "identity:sync": "node scripts/sync-identity.mjs",
+    "lighthouse": "node scripts/lighthouse-audit.mjs",
+    "pa11y": "node scripts/with-preview.mjs -- ./node_modules/.bin/pa11y-ci",
+    "postbuild": "node scripts/add-sitemap-lastmod.mjs && node scripts/fix-redirect-doctype.mjs && node scripts/optimize-images.mjs && node scripts/emit-page-markdown.mjs",
+    "prebuild": "node scripts/stage-media.mjs && node scripts/copy-llms.mjs",
+    "preview": "astro preview"
   },
   "dependencies": {
     "@astrojs/starlight": "^0.41.5",
@@ -34,6 +36,7 @@
   "devDependencies": {
     "html-validate": "^11.5.6",
     "lighthouse": "^13.4.1",
-    "pa11y-ci": "^4.1.1"
+    "pa11y-ci": "^4.1.1",
+    "puppeteer": "24.43.1"
   }
 }
diff --git a/site/pnpm-lock.yaml b/site/pnpm-lock.yaml
index 6a4618841..8d73bc46f 100644
--- a/site/pnpm-lock.yaml
+++ b/site/pnpm-lock.yaml
@@ -48,6 +48,9 @@ importers:
       pa11y-ci:
         specifier: ^4.1.1
         version: 4.1.1(supports-color@10.2.2)(typescript@5.9.3)
+      puppeteer:
+        specifier: 24.43.1
+        version: 24.43.1(supports-color@10.2.2)(typescript@5.9.3)
 
 packages:
 
diff --git a/site/scripts/check-guides-index.mjs b/site/scripts/check-guides-index.mjs
new file mode 100644
index 000000000..805d299ba
--- /dev/null
+++ b/site/scripts/check-guides-index.mjs
@@ -0,0 +1,143 @@
+// The guides index lists every guide, and says how many there are.
+//
+// start/guides.md is what the Start topic offers as the map of the library, and
+// it is written by hand. Nothing checked it, so it drifted: it linked 100 of the
+// 104 guides while stating 104 in the prose and again in the frontmatter
+// description, in both languages. Two substantial features were reachable only
+// from the sidebar, and the page contradicted itself in the text a search engine
+// quotes.
+//
+// Both halves are checked here. The links, because a guide that is not on the
+// map is as good as unwritten for a reader who starts there; and the count,
+// because a number in prose is a claim like any other. The spelled-out form is
+// checked too, since it is the half nobody remembers to update.
+//
+// Usage: node scripts/check-guides-index.mjs
+import { readFileSync, readdirSync, statSync } from 'node:fs';
+import { dirname, join, relative } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+import { topics } from '../src/data/topics.mjs';
+
+const here = dirname(fileURLToPath(import.meta.url));
+const CONTENT = join(here, '..', 'src', 'content', 'docs');
+
+/**
+ * The topics whose pages are guides: every one that teaches, which is every
+ * topic except the three carrying no teaching prose. Derived rather than
+ * listed, for the same reason the byline derives it (src/components/PageTitle).
+ */
+const NOT_A_DOMAIN = new Set(['start', 'reference', 'api']);
+const DOMAINS = topics.map((topic) => topic.id).filter((id) => id && !NOT_A_DOMAIN.has(id));
+
+/** Every markdown file under `dir`, at any depth. */
+function walk(dir, out = []) {
+	for (const name of readdirSync(dir)) {
+		const full = join(dir, name);
+		if (statSync(full).isDirectory()) walk(full, out);
+		else if (/\.mdx?$/.test(name)) out.push(full);
+	}
+	return out;
+}
+
+/** The guide routes of one locale, in tree order, without the index pages. */
+function guideRoutes(root) {
+	const routes = [];
+	for (const domain of DOMAINS) {
+		for (const file of walk(join(root, domain)).sort()) {
+			const route = relative(root, file).replace(/\.mdx?$/, '');
+			if (!/(^|\/)index$/.test(route)) routes.push(route);
+		}
+	}
+	return routes;
+}
+
+/** A count in words, in the two languages the site publishes. */
+function spell(n, lang) {
+	const table = {
+		en: {
+			units: ['', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten',
+				'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen',
+				'eighteen', 'nineteen'],
+			tens: ['', '', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'],
+		},
+		es: {
+			units: ['', 'uno', 'dos', 'tres', 'cuatro', 'cinco', 'seis', 'siete', 'ocho', 'nueve',
+				'diez', 'once', 'doce', 'trece', 'catorce', 'quince', 'dieciséis', 'diecisiete',
+				'dieciocho', 'diecinueve'],
+			tens: ['', '', 'veinte', 'treinta', 'cuarenta', 'cincuenta', 'sesenta', 'setenta',
+				'ochenta', 'noventa'],
+		},
+	}[lang];
+	const below100 = (v) =>
+		v < 20
+			? table.units[v]
+			: table.tens[Math.floor(v / 10)] +
+				(v % 10 ? (lang === 'es' ? ' y ' : '-') + table.units[v % 10] : '');
+	if (n < 100) return below100(n);
+	const rest = n % 100;
+	const hundreds = Math.floor(n / 100);
+	if (lang === 'es') {
+		const head = hundreds === 1 ? (rest ? 'ciento' : 'cien') : `${table.units[hundreds]}cientos`;
+		return rest ? `${head} ${below100(rest)}` : head;
+	}
+	// "a hundred and four" and "one hundred and four" are both the number; the
+	// page uses the first, and a rewrite to the second should not fail a check
+	// about arithmetic.
+	const head = hundreds === 1 ? '(?:a|one) hundred' : `${table.units[hundreds]} hundred`;
+	return rest ? `${head} and ${below100(rest)}` : head;
+}
+
+const LOCALES = [
+	{ lang: 'en', root: CONTENT, word: 'guides' },
+	{ lang: 'es', root: join(CONTENT, 'es'), word: 'guías' },
+];
+
+let failures = 0;
+const fail = (message) => {
+	console.error(`FAIL ${message}`);
+	failures += 1;
+};
+const ok = (message) => console.log(`ok   ${message}`);
+
+for (const { lang, root, word } of LOCALES) {
+	const routes = guideRoutes(root);
+	const index = readFileSync(join(root, 'start', 'guides.md'), 'utf8');
+
+	// The route has to appear as a link destination, not merely as text: a slug
+	// in a code block or a comment would satisfy a plain substring while giving
+	// the reader nothing to select.
+	const prefix = lang === 'es' ? '/phonometry/es/' : '/phonometry/';
+	const missing = routes.filter((route) => !index.includes(`](${prefix}${route}/)`));
+	if (missing.length > 0) {
+		fail(`${lang}: ${missing.length} guide(s) the index does not link: ${missing.join(', ')}`);
+	} else {
+		ok(`${lang}: the index links all ${routes.length} guides`);
+	}
+
+	// Every number that introduces the word, in the prose and in the frontmatter
+	// description, has to be the number of guides there are.
+	const digits = [...index.matchAll(new RegExp(String.raw`(\d{2,4})\s+${word}`, 'g'))].map((m) =>
+		Number(m[1]),
+	);
+	const wrong = digits.filter((n) => n !== routes.length);
+	if (digits.length === 0) fail(`${lang}: the index states no count`);
+	else if (wrong.length > 0) {
+		fail(`${lang}: the index says ${[...new Set(wrong)].join(', ')} where there are ${routes.length}`);
+	} else {
+		ok(`${lang}: every count it states in figures says ${routes.length}`);
+	}
+
+	// And the same number in words, which is the half nobody updates.
+	// `spell` returns a pattern rather than one spelling, since a number has more
+	// than one correct wording and the check is about the arithmetic.
+	const written = spell(routes.length, lang);
+	if (new RegExp(String.raw`\b${written}\s+${word}`, 'i').test(index)) {
+		ok(`${lang}: the count in words agrees with ${routes.length}`);
+	} else {
+		fail(`${lang}: the index does not say "${written} ${word}" anywhere, so its count in words has drifted from ${routes.length}`);
+	}
+}
+
+console.log(`\n${failures} failing check(s).`);
+process.exit(failures ? 1 : 0);
diff --git a/site/scripts/check-home-headings.mjs b/site/scripts/check-home-headings.mjs
index 8d5fb9cf3..5b4d9c4dc 100644
--- a/site/scripts/check-home-headings.mjs
+++ b/site/scripts/check-home-headings.mjs
@@ -176,7 +176,14 @@ for (const c of CASES) {
 	}
 	await page.setViewport({ width: c.width, height: c.height, deviceScaleFactor: SHOTS ? 2 : 1 });
 	await page.goto(`${BASE}${BASE_PATH}${c.path}`, { waitUntil: 'domcontentloaded', timeout: 90000 });
-	await page.addStyleTag({ content: 'astro-dev-toolbar{display:none !important}' });
+	// Only the dev server renders this toolbar, so against a preview of `dist`
+	// the rule matches nothing. The call itself is not free of consequence: the
+	// execution context can be replaced between the navigation and it, and the
+	// rejection failed a whole run once for a style rule that had nothing to
+	// hide. Losing it costs nothing, so it is allowed to fail.
+	await page
+		.addStyleTag({ content: 'astro-dev-toolbar{display:none !important}' })
+		.catch(() => {});
 	await new Promise((r) => setTimeout(r, 500));
 
 	const { problems, root, wrapped } = await page.evaluate(audit);
diff --git a/site/scripts/check-lang-suggest.mjs b/site/scripts/check-lang-suggest.mjs
index 93b692723..54db035de 100644
--- a/site/scripts/check-lang-suggest.mjs
+++ b/site/scripts/check-lang-suggest.mjs
@@ -139,7 +139,14 @@ expect(
 	await new Promise((r) => setTimeout(r, 400));
 	// The dev server parks its toolbar in the middle of the bottom edge, and
 	// it hit-tests. It is not part of the site.
-	await page.addStyleTag({ content: 'astro-dev-toolbar{display:none !important}' });
+	// Only the dev server renders this toolbar, so against a preview of `dist`
+	// the rule matches nothing. The call itself is not free of consequence: the
+	// execution context can be replaced between the navigation and it, and the
+	// rejection failed a whole run once for a style rule that had nothing to
+	// hide. Losing it costs nothing, so it is allowed to fail.
+	await page
+		.addStyleTag({ content: 'astro-dev-toolbar{display:none !important}' })
+		.catch(() => {});
 	const hits = await page.evaluate(() => {
 		// A regression that keeps the bar off screen is exactly what this check
 		// is for, so report it as a failed hit test rather than throwing a raw
diff --git a/site/scripts/check-page-chips.mjs b/site/scripts/check-page-chips.mjs
index d691d072b..4a184a90f 100644
--- a/site/scripts/check-page-chips.mjs
+++ b/site/scripts/check-page-chips.mjs
@@ -113,7 +113,14 @@ async function landing({ path, viewport, theme, banner }) {
 		banner ? (path.startsWith('/es/') ? ['en-US', 'en'] : ['es-ES', 'es']) : null,
 	);
 	await page.goto(`${BASE}${BASE_PATH}${path}`, { waitUntil: 'networkidle0', timeout: 90000 });
-	await page.addStyleTag({ content: 'astro-dev-toolbar{display:none !important}' });
+	// Only the dev server renders this toolbar, so against a preview of `dist`
+	// the rule matches nothing. The call itself is not free of consequence: the
+	// execution context can be replaced between the navigation and it, and the
+	// rejection failed a whole run once for a style rule that had nothing to
+	// hide. Losing it costs nothing, so it is allowed to fail.
+	await page
+		.addStyleTag({ content: 'astro-dev-toolbar{display:none !important}' })
+		.catch(() => {});
 	const out = await page.evaluate(async (wantBanner) => {
 		const wait = (ms) => new Promise((r) => setTimeout(r, ms));
 		const bar = document.getElementById('lang-suggest');
diff --git a/site/scripts/check-sidebar.mjs b/site/scripts/check-sidebar.mjs
index aec99c372..decf67deb 100644
--- a/site/scripts/check-sidebar.mjs
+++ b/site/scripts/check-sidebar.mjs
@@ -262,7 +262,14 @@ async function open(path, { phone = false } = {}) {
 	const page = await context.newPage();
 	await page.setViewport(phone ? { width: 390, height: 844 } : { width: 1440, height: 900 });
 	await page.goto(`${BASE}${BASE_PATH}${path}`, { waitUntil: 'networkidle0', timeout: 90000 });
-	await page.addStyleTag({ content: 'astro-dev-toolbar{display:none !important}' });
+	// Only the dev server renders this toolbar, so against a preview of `dist`
+	// the rule matches nothing. The call itself is not free of consequence: the
+	// execution context can be replaced between the navigation and it, and the
+	// rejection failed a whole run once for a style rule that had nothing to
+	// hide. Losing it costs nothing, so it is allowed to fail.
+	await page
+		.addStyleTag({ content: 'astro-dev-toolbar{display:none !important}' })
+		.catch(() => {});
 	if (phone) {
 		await page.evaluate(() => document.querySelector('starlight-menu-button button')?.click());
 		await new Promise((r) => setTimeout(r, 300));
diff --git a/site/scripts/shared/audit.mjs b/site/scripts/shared/audit.mjs
index 0fb77c5d6..015f50776 100644
--- a/site/scripts/shared/audit.mjs
+++ b/site/scripts/shared/audit.mjs
@@ -24,11 +24,12 @@ export const BASE_PATH = basePath;
 /**
  * The puppeteer package.
  *
- * It is in the tree because pa11y-ci depends on it, not because we declare it,
- * so under pnpm's default layout it is not linked into site/node_modules and a
- * plain import does not find it. Normal resolution first (which is what works
- * under `node-linker=hoisted`, npm and yarn), then the virtual store, then one
- * actionable error.
+ * It is a declared dev dependency now. It used to be in the tree only because
+ * pa11y-ci depends on it, which under pnpm's default layout does not link it
+ * into site/node_modules at all: a plain import did not find it, and five
+ * checks rested on a package that a pa11y-ci upgrade could have taken away
+ * without a word. The store lookup below is kept because it costs nothing and
+ * still answers the case where the declared copy is not linked.
  */
 export function loadPuppeteer() {
 	const require = createRequire(import.meta.url);
diff --git a/site/src/content/docs/es/start/guides.md b/site/src/content/docs/es/start/guides.md
index f7f15f368..5fcd2fff3 100644
--- a/site/src/content/docs/es/start/guides.md
+++ b/site/src/content/docs/es/start/guides.md
@@ -318,6 +318,10 @@ ANSI/ASA S12.2 y ASTM E413/E1414.
 - [Transmisión por flancos en laboratorio (ISO 10848)](/phonometry/es/buildings/insulation/flanking-lab/):
   el índice de reducción de vibraciones de unión y las diferencias de niveles de
   flanco medidas en una instalación de ensayo.
+- [Fuentes de impacto pesadas y blandas (ISO 16283-2)](/phonometry/es/buildings/insulation/heavy-impact-sources/):
+  la pelota de caucho y la máquina de neumático: el nivel de exposición a la
+  fuerza de impacto que las especifica, la comprobación de laboratorio que tienen
+  que pasar y el número único del anexo D de ISO 717-2.
 - [Índices globales de aislamiento (ISO 717)](/phonometry/es/buildings/insulation/insulation-ratings/):
   los motores de curva de referencia aéreo y de impactos con $C$, $C_{tr}$ y
   $C_I$, los términos de rango ampliado y la ficha de ISO 717.
@@ -334,6 +338,10 @@ ANSI/ASA S12.2 y ASTM E413/E1414.
 - [Predicción del aislamiento acústico (EN 12354)](/phonometry/es/buildings/design/insulation-prediction/):
   el aislamiento in situ a ruido aéreo y de impactos entre recintos a partir de
   datos de elementos, con sus caminos de flancos.
+- [Predicción detallada por bandas (ISO 12354)](/phonometry/es/buildings/design/detailed-prediction/):
+  la misma predicción banda a banda en vez de como un solo número: datos in situ
+  de elemento y de unión, el índice por flancos y el nivel de impactos, y la
+  contribución de cada camino a R'w y L'n,w.
 - [Predicción del aislamiento de paneles](/phonometry/es/buildings/design/panel-sound-insulation/):
   la ley de masa y la caída de coincidencia, las paredes dobles, rendijas y
   aberturas, la eficiencia de radiación de placas y las movilidades puntuales.
@@ -446,6 +454,10 @@ IEC 61400-11.
   la fuente viaria común europea del Anexo II 2.2: potencia acústica de rodadura
   y propulsión por categoría de vehículo y potencia direccional por metro de
   línea fuente.
+- [Emisión de la fuente ferroviaria CNOSSOS-EU](/phonometry/es/environment/sources/cnossos-rail-emission/):
+  la fuente ferroviaria del anexo II 2.3: rugosidad y filtro de contacto, ruido
+  de impacto, chirrido en curva, tracción y ruido aerodinámico, y las dos líneas
+  de fuente equivalentes.
 - [Efecto suelo esférico y barreras avanzadas](/phonometry/es/environment/propagation/ground-barriers/):
   el coeficiente de reflexión de Weyl-Van der Pol sobre suelo de impedancia
   finita y la difracción en barreras desde la teoría ondulatoria.
@@ -491,6 +503,11 @@ ISO 17208-1/-2, ISO 18406 y JOMOPANS-ECHO.
   los solvers de modos normales, trazado de rayos y ecuación parabólica de la
   guía de ondas estratificada, y cómo elegir modelo de propagación.
 
+- [Exposición a ruido de mamíferos marinos](/phonometry/es/underwater/marine-mammal-exposure/):
+  la cara auditiva de ese ruido: los audiogramas de grupo, las funciones de
+  ponderación reglamentarias con su versión de guía, y la exposición de una
+  campaña de hincado frente a los criterios de lesión.
+
 ## [Fuentes y dispositivos](/phonometry/es/devices/)
 
 Potencia acústica, intensidad, declaraciones de emisión, electroacústica y
diff --git a/site/src/content/docs/start/guides.md b/site/src/content/docs/start/guides.md
index cfbd0838f..a009e75e6 100644
--- a/site/src/content/docs/start/guides.md
+++ b/site/src/content/docs/start/guides.md
@@ -304,6 +304,10 @@ ISO 12999-1, ISO 10052, ANSI/ASA S12.2 and ASTM E413/E1414.
 - [Laboratory Flanking Transmission (ISO 10848)](/phonometry/buildings/insulation/flanking-lab/):
   the junction vibration reduction index and the flanking level differences
   measured on a test facility.
+- [Heavy and Soft Impact Sources (ISO 16283-2)](/phonometry/buildings/insulation/heavy-impact-sources/):
+  the rubber ball and the bang machine: the impact force exposure level that
+  specifies them, the laboratory check they have to pass, and the single number
+  of ISO 717-2 Annex D.
 - [Insulation Ratings (ISO 717)](/phonometry/buildings/insulation/insulation-ratings/):
   the airborne and impact reference-curve engines with $C$, $C_{tr}$ and $C_I$,
   the enlarged-range terms and the ISO 717 fiche.
@@ -319,6 +323,10 @@ ISO 12999-1, ISO 10052, ANSI/ASA S12.2 and ASTM E413/E1414.
 - [Predicting Sound Insulation (EN 12354)](/phonometry/buildings/design/insulation-prediction/):
   in-situ airborne and impact insulation between rooms from element data, with
   their flanking paths.
+- [Detailed Per-Band Prediction (ISO 12354)](/phonometry/buildings/design/detailed-prediction/):
+  the same prediction band by band rather than as one number: in-situ element and
+  junction data, the flanking index and impact level, and the per-path
+  contributions behind R'w and L'n,w.
 - [Predicting Panel Sound Insulation](/phonometry/buildings/design/panel-sound-insulation/):
   the mass law and coincidence dip, double walls, slits and apertures, plate
   radiation efficiency and point mobilities.
@@ -423,6 +431,10 @@ SAE ARP 5534, ECAC Doc 29/32 and IEC 61400-11.
 - [CNOSSOS-EU road traffic source emission](/phonometry/environment/sources/cnossos-road-emission/):
   the common EU road source of Annex II 2.2: rolling and propulsion sound power
   per vehicle category and the directional power per metre of source line.
+- [CNOSSOS-EU railway source emission](/phonometry/environment/sources/cnossos-rail-emission/):
+  the rail source of Annex II 2.3: roughness and the contact filter, impact
+  noise, curve squeal, traction and aerodynamic noise, and the two equivalent
+  source lines.
 - [Spherical ground effect and advanced barriers](/phonometry/environment/propagation/ground-barriers/):
   the Weyl-Van der Pol reflection coefficient over finite-impedance ground, and
   wave-theoretic barrier diffraction.
@@ -467,6 +479,11 @@ JOMOPANS-ECHO.
   the normal-mode, ray-tracing and parabolic-equation solvers of the
   stratified waveguide, and how to choose a propagation model.
 
+- [Marine-mammal noise exposure](/phonometry/underwater/marine-mammal-exposure/):
+  the hearing side of that noise: the group audiograms, the regulatory weighting
+  functions with their guidance version, and the exposure of a pile-driving
+  campaign against the injury criteria.
+
 ## [Sources and devices](/phonometry/devices/)
 
 Sound power, intensity, emission declarations, electroacoustics and programme
diff --git a/site/src/data/topics.mjs b/site/src/data/topics.mjs
index 863e790d5..52fba75af 100644
--- a/site/src/data/topics.mjs
+++ b/site/src/data/topics.mjs
@@ -275,8 +275,7 @@ export const topics = [
           'vibration/structural/mechanical-mobility',
           'vibration/structural/junction-transmission',
           'vibration/structural/transfer-stiffness',
-          'devices/emission/vibration-sound-power',
-                ],
+        ],
       },
       {
         label: 'Human vibration',
@@ -383,6 +382,7 @@ export const topics = [
           'devices/emission/sound-power',
           'devices/emission/sound-power-pressure',
           'devices/emission/sound-power-reverberation',
+          'devices/emission/vibration-sound-power',
           'devices/emission/sound-power-intensity',
         ],
       },
diff --git a/src/phonometry/_compat.py b/src/phonometry/_compat.py
index 10bc9beef..fd1dea253 100644
--- a/src/phonometry/_compat.py
+++ b/src/phonometry/_compat.py
@@ -46,7 +46,7 @@
 #: Old module path -> relocated module path for the 4.0 taxonomy. The
 #: oversized ``metrology`` catch-all became three packages: the normalized
 #: frequency selectivity in ``filters``, the general signal analysis in
-#: ``signal``, and the transverse metrology that gives the package its name.
+#: ``signals``, and the transverse metrology that gives the package its name.
 _MOVED_4X: dict[str, str] = {
     "phonometry.metrology.core": "phonometry.filters.core",
     "phonometry.metrology.filter_design": "phonometry.filters.design",