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Device tests

Microphone test

Find out whether your computer or phone hears your microphone, how loud it is and whether it hisses. First three seconds of silence to measure the noise floor, then five seconds of speech to measure your voice and record a clip you can play back.

The recording lives only in this page’s memory: it is never uploaded or saved and is wiped by “Delete recording” or when you leave the page. Your browser asks for microphone access only after you press “Start test”.

Press “Start test” — your browser will ask for microphone access.

−60−45−30−150 dBFS

— dBFS

Everything runs in your browser: sound, video and keystrokes are never sent or stored.

What next

How to read the result

  • “Your microphone works” — your voice is clearly louder than the background. If a call app still can’t hear you, it is using another input.
  • “Very quiet” — your voice peaks below −35 dBFS. Raise the input level or speak closer.
  • “A lot of noise” — the background is above −45 dBFS in silence: hum, interference or mic boost.
  • “No signal” — the mic sends no sound: a mute switch, the wrong input or a busy device.
  • dBFS is the level relative to digital full scale: 0 is the ceiling, normal speech on a decent mic sits between −30 and −12.

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Frequently asked questions

Is my voice sent anywhere?
No. Sound is analysed in your browser; the clip is kept in page memory only and is deleted when you close the page or press “Delete recording”.
Why doesn’t my browser ask for microphone access?
You probably blocked it earlier. Click the lock or site settings icon in the address bar, allow the microphone and reload. The test shows the steps for your browser.
The mic works here but not in Zoom or Teams. Why?
The app uses another input or is muted. Open the app’s audio settings and pick the same microphone as in the test list.
Can I test a microphone on my phone?
Yes. Open this page in Chrome on Android or Safari on iPhone and press “Start test”. On iPhone recording starts only after a tap — that’s how Safari works.
Why does my microphone hiss?
Usually it’s mic boost, a laptop fan nearby or a cheap cable. Turn off boost and move the mic away from noise sources.