David Attenborough’s voice, measured

The read

You know this voice from narration: hushed, patient, a pause while the whale surfaces. This is not that. This is a 2012 radio interview — Attenborough in quick, ordinary conversation, telling a story that ends with a gibbon on his shoulder — and across the entire sixty-one-second answer he does not pause once. What survives outside the narration booth is the tune: the famous rise of wonder is right there in his everyday speech, every melody reading squarely in the optimal band. What doesn’t survive is the stillness. Off script, the voice the world knows for its patience never stops moving.

Pitch contour · every voiced frame

Pitch & melody

Average pitch135Hz

in the zoneoptimal 100–150 Hz

Pitch variability4.79st

in the zoneoptimal 3–6.5 st

Pitch range11.8st

in the zoneoptimal 7–12 st

Pitch dynamism (PDQ)0.33

in the zoneoptimal 0.15–0.38

Pacing & pauses

Pause ratio0.0%

below the zoneoptimal 18–35 %

Average pause length0.0s

below the zoneoptimal 0.4–1 s

Syllable rate3.43syl/s

below the zoneoptimal 4–5.5 syl/s

Dynamics

Volume dynamics24.8dB

above the zoneoptimal 8–18 dB

Loudness variability7.39dB

in the zoneoptimal 3.5–8 dB

Voice quality

Voice clarity (HNR)9.45dB

below the zoneoptimal 12–30 dB

Pitch steadiness (jitter)3.82%

above the zoneoptimal 0–2.5 %

Volume steadiness (shimmer)12.9%

above the zoneoptimal 0–9 %

Vocal fry (creak)5.1%

in the zoneoptimal 0–8 %

Spectral balance

Presence band (2-4 kHz)2.3%

below the zoneoptimal 6–20 %

Chest band (0-500 Hz)82.0%

above the zoneoptimal 35–75 %

Spectral tilt (alpha ratio)-10.5dB

in the zoneoptimal -22–-8 dB

Energy by band

Low (0–500 Hz)82.0%Mid (0.5–2 kHz)15.0%Presence (2–4 kHz)2.3%Brilliance (4 kHz+)0.7%

The presence band (2–4 kHz, red) is what carries a voice to the back of a room.

Comparisons are based on Resonate's acoustic analysis of publicly available speeches. No endorsement or affiliation is implied.

Source

Desert Island Discs 70th-anniversary edition, BBC Radio 4, 29 Jan 2012 — official BBC podcast archive. 61 s continuous answer analysed (21:17–22:18).

Find the 29 Jan 2012 episode · BBC Desert Island Discs archive

Recording caveat

This is a 2012 BBC radio interview, not a narration-booth recording — presenter questions and brief music cues sit either side of the analysed segment, and podcast/interview audio like this can flatten dynamics compared with a clean solo take.

Method

analysis-service pipeline (app/analysis.py, app/benchmarks.py, app/qualities.py) run locally over the segments documented in docs/hero-sources.md. Acoustic metrics only — no transcription, so transcript-dependent metrics (wpm, fillers) are absent and the overall score weighs the acoustic set.

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Steal this

audible wonder

The measured strength is melody: depth, sweep and liveliness all read optimal, even at interview speed. The lift you hear on the marvels — the audible raised eyebrow — rides on range, and range is built, not owned. Stretch it like a hamstring: on an “ng” sound, glide from your lowest comfortable note up to your highest and back down, smooth as a slow siren, no pushing. Then pick the detail you genuinely find astonishing and let your pitch lift on it.

From the training library: Sirens

Same instrument · same scale

You’ve just read Attenborough’s voice. Now read your own.

Measure my voice

Free · about twenty seconds · no signup. The same six scores on the same scale — and the recording is deleted the moment it’s analysed.