🚦 Noise Meter
When the room gets loud, the light turns red. It helps students adjust their own voice level.
Try it now →Free classroom noise monitor web tool
Traffic light display
Green when it is quiet, yellow when it gets a little loud, and red when it gets very loud — shown on one side of the screen.
Adjustable sensitivity
Set it more forgiving for times when some noise is fine, like group work.
No privacy worries
It only calculates the volume level. Nothing is recorded, saved or sent.
How to use it
- Open Tools → the 🚦 Noise tab.
- Pick a sensitivity and press “Turn on noise meter”.
- Allow microphone access when your browser asks.
Frequently asked questions
What if my computer has no microphone?
You need a microphone. The built-in mic on a laptop or interactive display is enough.