Off
Browser processing

Leave all three off to measure the raw microphone. Turn them on to hear what call apps (Meet, Zoom, Discord) will get.

Input level

Average level–
Peak–
Clipping–
Noise floor–
Dominant frequency–
Mains hum–

9-second auto test

Stay quiet for 3 seconds so the page can measure background noise, then read a sentence aloud for 6 seconds. You get a verdict on level, distortion, noise and frequency range, plus the recording to play back.

Test recording

Record up to 30 seconds and play it back. The recording stays in your browser and is gone when you close the page.

Live monitoring

Plays the microphone through your speakers as you speak. Wear headphones; with speakers it will howl.

Audio from your microphone is analysed only in the browser and never sent to the server.

dBFS is measured against the loudest level the device can capture (0 dBFS), not real loudness in the room. Results also depend on the input volume set in your operating system.

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