Classroom Noise Meter
Display a classroom noise meter using local microphone analysis, with clear privacy notes and projector-friendly volume cues.
Microphone permission is required.
Audio is analyzed in this browser only. Nothing is recorded, uploaded, or transcribed.
Current level
Waiting for microphone
0
Waiting for microphone
Audio is analyzed in this browser only. Nothing is recorded, uploaded, or transcribed.
Features
- Reads microphone volume locally without recording audio.
- Shows quiet, working, and too-loud cues for classroom projection.
- Includes calibration, sensitivity controls, and privacy guidance.
How to use
- Allow microphone access when the browser asks.
- Choose a classroom scene and adjust sensitivity if needed.
- Use the meter on screen and stop listening when the activity ends.
Privacy
Audio is analyzed in your browser only. The tool does not record, upload, store, or transcribe classroom sound.
FAQ
Does this record classroom audio?
No. It only calculates volume in the browser.
Why does the browser ask for microphone permission?
The meter needs microphone access to read volume level. It does not send audio anywhere.
Why does it not start on my local domain?
Some browsers require HTTPS or localhost for microphone access.