What to do
Start the microphone, allow access, and speak at a normal volume. Check that the signal rises and falls as you speak.
Microphone Test
Check microphone permission, input level, peak signal, and detected audio source.
Idle0Input Level
Peak0%
ChannelsUnavailable
Digital levelNot measured
Local history
Save a result to keep it in this browser. History holds your five most recent saved results for this test.
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How to use this test
What to look for
Keep distance and input settings consistent when comparing captured readings.
Web Audio analyzes the microphone signal after you grant access. dBFS describes digital signal level; it is not calibrated sound pressure in dB SPL. Gain, noise suppression, distance, and room noise affect readings.