Microphone Test Online
Verify that your microphone is working properly before a meeting or recording. ProbeCheck analyzes your mic's volume levels, measures background noise floor in decibels with a live frequency spectrum visualization, and checks sample rate and audio input quality directly in your browser.
Browser PrecisionHigh
Sample rate from AudioContext. Volume levels analyzed in real-time using AnalyserNode.
Frequently Asked Questions
Why is my microphone not working on Zoom or Teams?
Ensure you have granted microphone permission in your browser. In Chrome, click the lock icon next to the URL and enable microphone access. Also check your system's default input device.
What is microphone noise floor and how do I measure it?
Noise floor is the level of background noise picked up by your microphone when no one is speaking. It's measured in decibels (dB). A lower noise floor (e.g., -40 dB or below) means a quieter environment. ProbeCheck displays a live frequency spectrum and noise floor dB value during the quiet phase of the test.
How to test my microphone before a call?
Click 'Start Test' above. ProbeCheck will display your microphone's input level in real-time, allowing you to verify it's working without installing any software.
Is this microphone test safe and private?
Yes. ProbeCheck does not record or upload any audio data. All testing happens locally in your browser, and no data leaves your device.