Classroom Noise Meter
The Classroom Noise Meter turns your device microphone into a live volume display. Green means calm, yellow is a warning, red means too loud. Audio never leaves your browser, nothing is recorded.
Classroom Noise Meter
Free, private, no signup
The microphone is only used to measure volume. Audio is processed locally in your browser and never recorded, uploaded or stored. Works best when projected so the whole class can see it.
How to use the noise meter
- Click Start and allow microphone access when your browser asks.
- Project the meter so the class can see the live volume zones.
- Agree the rules with your class: green is good, red means quiet down.
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Frequently asked questions
How does the online noise meter work?
It listens through your device microphone and shows the live volume level on a green, yellow and red gauge.
Is my classroom audio recorded or uploaded?
No. The audio is only measured in your browser to move the gauge. Nothing is recorded, saved or uploaded.
What do the green, yellow and red zones mean?
Green means a calm working volume, yellow is getting loud, and red means the class should quiet down.
Why is my microphone blocked, and how do I allow it?
Browsers block the microphone by default. Click the camera or microphone icon in your address bar and choose Allow, then press Start again.
Can I adjust the sensitivity of the noise meter?
Yes. Use the sensitivity control to tune the meter for a quiet classroom or a noisy hall.