Classroom Noise Meter

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A large traffic light that helps a room see when the collective volume is climbing.

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About this tool

How it works

The meter uses relative microphone amplitude, not calibrated decibels. Set the threshold to suit the room and device.

Example

Place the device where everyone can see it, start listening, and adjust sensitivity until normal conversation stays green.

Private by default

The calculation or transformation happens in this browser. There is no account, and the values you enter are not sent to Naughty Bear Labs.

Install Noise Meter

Open your browser menu and choose Install app or Add to Home screen.