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Sound Meter

Estimate ambient noise level in decibels using the mic.

Measure surrounding noise in real time using your microphone. Audio is analyzed only in your browser and is never saved or sent anywhere.

What is this?

This tool analyzes sound picked up by your device's microphone in real time and shows a relative decibel (dB) estimate. It is not a precisely calibrated absolute value like a professional sound level meter, but a reference estimate useful for getting a rough sense of how quiet or loud your surroundings are.

How to use it

Press Allow Microphone and your browser will ask for microphone permission. Once allowed, measurement starts immediately, showing the current dB value, a gauge, and the peak and average since you started. Use Stop to end measurement at any time, and Reset stats to restart just the peak/average tracking.

Note: Audio is analyzed only inside your browser and is never recorded, saved, or sent to a server.
Real-world uses

Use it to get a rough sense of how quiet a study room or office is, compare how noise from neighbors or traffic changes over time, or check the noise level in a nursery or bedroom for reference. For official disputes or complaints, always use readings from a properly calibrated professional sound level meter.

FAQ

Does the measured dB value match a real sound level meter?
No. This tool produces a relative, best-effort estimate that varies with your device's microphone sensitivity and browser processing. It is not calibrated like a professional sound level meter, so use it only as a reference for relative loudness, not an absolute decibel value.
Nothing happens when I press Allow Microphone.
Check the lock icon in your browser's address bar to make sure microphone access isn't blocked. This feature also requires HTTPS, and access may fail if another tab or app is already using the microphone.
Is audio recorded or sent to a server?
No. Microphone audio is analyzed only in real time inside your browser and is never stored or transmitted anywhere. The audio stream stops immediately when you stop measuring or leave the page.
At what dB does it become "loud"?
As a general guide, a quiet room is around 30-40dB, normal conversation is around 60dB, road traffic is around 70-80dB, and construction sites or concerts can exceed 90dB. Since this tool's readings are relative estimates, they're best used to track changes on the same device and environment rather than for precise comparisons against these reference values.

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