Classroom Noise Meter
A friendly volume gauge. Set the too-loud line, teach on.
Microphone privacy: The noise meter needs your browser's microphone permission to measure volume in real time. Your audio is analyzed entirely on your device — nothing is recorded, streamed, or saved. You can stop capturing at any time by clicking the Stop button above, closing this tab, or revoking the site's microphone permission in your browser settings.
Live noise level
Click Start listening to review the microphone consent, then allow access when prompted.
How the noise meter works
Start listening, then project the meter. The face and bars react to the room's volume in real time, and the screen flashes when the class crosses your too-loud line. Drag the threshold slider to match your room — lower for independent reading, higher for group work.
Tips for classroom volume management
Set the expected level before an activity starts, name it out loud ("partner voices"), and let the meter do the reminding instead of your voice. Audio is analyzed on your device only and is never recorded or uploaded.
Questions teachers ask
- Is classroom audio recorded or uploaded?
- No. The microphone level is analyzed on your device only. Nothing is recorded, saved, or sent anywhere.
- Why does the noise meter ask for microphone permission?
- The browser needs permission to read live volume levels. You can revoke it any time, and the meter stops listening as soon as you press stop.
- Can I change how loud is too loud?
- Yes. Drag the threshold slider to match your activity — lower for independent reading, higher for group work. The screen flashes when the class crosses the line.
- Does it work on a Chromebook or iPad?
- Yes, in any modern browser with a working microphone. No install and no account needed.
More free classroom tools
All free, no accounts, and built for the projector. Open one in another tab and use them together.
- Random Student PickerPick who answers, reads, or goes next without the same hands every time.
- Classroom TimerPut a visible time limit on the activity so clean-up actually happens.
- Random Group GeneratorSplit the class into teams or stations before you start.
- Classroom ScoreboardTrack team points during review games and competitions.
- Classroom DiceRoll for math warmups, turn order, or movement brain breaks.