Sound Gym

P vs B

Voiceless /p/ vs voiced /b/ — same lips, one tiny difference: your vocal cords.

/p/ and /b/ are made in exactly the same way — both lips press together and then release. The only difference: /p/ is voiceless (vocal cords stay open, silent) and /b/ is voiced (vocal cords vibrate from the very start). Linguists call both sounds bilabial stops.

Test 1 — hand on throat

Place your fingertips lightly on your throat. Say “bbb” continuously — you will feel a buzz. Now say “ppp” — silence. That buzz is your vocal cords vibrating.

Test 2 — puff of air

Hold your open hand a few centimetres from your mouth. Say “pop” — feel a small puff of air hit your palm. Say “bob” — much less puff. The /p/ releases a burst of air called aspiration.

Bonus effect: vowels before a voiced consonant are slightly longer than before a voiceless one. So beach holds the /iː/ a touch longer than peach. Your ear picks this up even before it hears the consonant.

Why /p/ and /b/ are so often confused — the linguistics

1 — Place and manner of articulation

Both /p/ and /b/ are bilabial plosives. Bilabial means you press your two lips together to block the airflow; plosive means you release that built-up air suddenly in a tiny burst. Because your mouth, lips, and tongue are in the exact same position for both sounds, your brain tends to treat them as a single motor movement — which is exactly why mixing them up feels so natural.

2 — The one difference: voicing

The only thing that separates them is whether your vocal cords vibrate:

/b/ — voiced

Your vocal cords vibrate immediately as you release the air. Place a hand on your throat — you feel that buzzing sensation straight away.

/p/ — voiceless

Your vocal cords stay relaxed and silent. Instead of a buzz you release a sharp burst of air — aspiration. This is exactly why the paper trick works: that puff isn't present in the voiced /b/.

3 — Why it matters for learners

Because the physical shape of the mouth is identical, non-native speakers — and anyone whose first language doesn't distinguish voiced from voiceless plosives in the same way — often find their brain filtering out the difference. If your native language treats /p/ and /b/ as variations of the same sound rather than two separate phonemes, your auditory system has never learned to flag that distinction as meaningful for understanding words. Retraining that filter is the core of the practice on this page.

Minimal pairs — click to hear

/p/ — voiceless	/b/ — voiced

Hover a word and click to hear it. Say both words in a pair back-to-back — listen for the buzz in the /b/ word.

Hear it in the wild

Real speech from native speakers — the most reliable way to check a pronunciation, since automated audio can vary by device and browser.

YouGlish↗

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Hear native speakers say “pin” in real sentences — news, lectures, and podcasts.