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Microphone check

Mic test

Live level meter, room noise, voice gap and a 5-second playback, measured from your own microphone.

Runs only in this browser. Nothing is recorded, stored or uploaded.

Press start. Your browser will ask to use the microphone.

--dBFS now
Level, last 10 seconds
Spectrum, 50 Hz to 16 kHz
1

Room noise

Stay quiet for 3 seconds.

2

Your voice

Talk normally for 5 seconds, then listen back.

Peak
--
Clipped samples
--
Room noise
--
Voice level
--
Voice gap
--
Sample rate
--
Channels
--
Processing
--

How to read it

Level now and peak
In dBFS. 0 is the loudest a digital signal can go; normal speech sits well below it. A peak that touches 0 is clipping.
Room noise
Measured while you stay quiet for 3 seconds. Fans, traffic and computer hum all show up here.
Voice gap
How many dB your speaking level sits above the room noise. A bigger gap means a cleaner recording.
Playback
Listen to your 5-second clip. Your ears catch echo and muffled sound that a meter cannot.

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Questions

Is my voice recorded or uploaded?

No. The sound is analysed in this browser tab with the Web Audio API. The 5-second clip is kept in the tab's memory only, and it is gone when you close or reload the page.

The browser never asked for my microphone. What now?

You probably blocked it earlier. Click the lock or settings icon next to the address, allow the microphone for this site, then reload.

What does dBFS mean?

Decibels relative to full scale. 0 dBFS is the ceiling of a digital signal, so every normal reading is negative. Anything that reaches 0 is cut off, which you hear as crackle or distortion.

Why does my level look different in Zoom or Meet?

Call apps switch on noise suppression, echo cancellation and automatic gain. Tick "Raw signal" to see what the microphone delivers without them.

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Photo: Jessica Lewis / Pexels