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.
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Click Start listening to review the microphone consent, then allow access when prompted.