Classroom Noise Meter

Local microphone noise visualization with green / yellow / red thresholds

Mic off

0

Peak 0 · relative units (not certified dB)

Thresholds & sensitivity

Privacy: Audio is processed only in your browser for live level display. Nothing is recorded, stored, or uploaded. Mic access starts only after you click Enable microphone. Levels are relative estimates — not calibrated decibel readings. Results vary by device and browser.

Results

Mic off

Export result

Levels are relative estimates — not certified dB. Audio never leaves your browser.

How to use

Follow these steps to get a result

  1. Click Enable microphone and allow access when prompted.

  2. Adjust yellow/red thresholds and sensitivity for your room.

  3. Use full screen so students can see the live color state.

  4. Click Stop to release the microphone.

Features

What this tool includes

  • Local-only audio processing

  • No recording or upload

  • Adjustable thresholds

  • Full-screen view

  • Optional zone sounds

  • Peak hold

  • Export result summary (Copy / CSV / PDF)

FAQ

Common questions about this tool

No. The meter reads instantaneous amplitude for display only. When you stop, the microphone track is released.

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