Microphone Test: Record and Play Back Your Voice
Start and allow microphone access to inspect the signal. Optionally record up to 30 seconds, finish recording and play it locally. Stop releases the microphone. No live speaker monitoring is enabled.
Results
Start →
How to use this tool
Start and allow microphone access to inspect the signal. Optionally record up to 30 seconds, finish recording and play it locally. Stop releases the microphone. No live speaker monitoring is enabled.
| Results | Method and units |
|---|---|
| RMS | √(Σ sample² / N) |
| dBFS | 20 × log₁₀(RMS) |
| Sample rate | AudioContext.sampleRate, Hz |
Example
RMS: 0.1 · dBFS: −20 · Sample rate: 48000 Hz
What this test can and cannot tell you
Results reflect events and signals available to your browser. Settings, permissions and device support can affect them; they do not certify that hardware is healthy or faulty.
Microphone dBFS is a digital signal level, not room dB SPL
Allow access only when you want to run the test. Stop the test to release the device.