Classroom noise meter
Live traffic-light noise meter using your microphone — nothing is recorded.
Runs in your browserFree — no signup
How to use Classroom noise meter
Classroom noise meter listens through your microphone and shows a live traffic-light signal: green for good working volume, amber as it builds, red when it is too loud. Set your own quiet threshold. Audio is analysed on your device and never recorded or uploaded.
Step by step
- 1Set your duration and options.
- 2Choose sound behaviour — ticking, per-minute chimes or an end alarm only.
- 3Press start, then go fullscreen so the whole room can see it.
- 4Pause, reset or add time at any point without losing your setup.
What to expect
- Large, high-contrast display that reads clearly from the back of a room.
- No ads, no video player, no unexpected autoplay — unlike using a video site.
- Keeps running accurately even if the tab is in the background.
Common use cases
- Timeboxing group exercises in a workshop.
- Exam, quiz and presentation timing.
- Stand-ups, retrospectives and lightning talks.
- Focus and break intervals while studying.
Privacy & data
Runs entirely in your browser. No account, no tracking of your session.
Frequently asked questions
Related tools — send your output onward