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 NaughtyBear Labs.
How to use Noise Meter
- Allow microphone access and place the display where the group can see it.
- Adjust sensitivity until the normal working level stays green.
- Use amber and red as shared visual cues, recalibrating if the room or device changes.
Common questions
- Does this measure calibrated decibels?
- No. It measures relative microphone amplitude and should not be used for hearing-safety decisions.
- Is classroom audio recorded or uploaded?
- No. The browser analyses the live level locally and does not save a recording.