Real-time dB display
Shows an approximate decibel reading updated multiple times per second — a useful reference for noisy environments, classrooms, or workplaces.
Noise Meter
Measure real-time ambient noise levels and decibels (dB) using your device microphone. Fast, private sound level meter in browser.
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How to use Noise Meter
- 1
Allow microphone access when your browser requests permission.
- 2
The meter displays the current ambient sound level in approximate decibels (dB).
- 3
Watch the gauge and colour indicator as sound levels change in real time.
- 4
Use the peak hold feature to track the loudest sound recorded in a session.
Why use this tool?
Visual level indicator
Colour-coded gauge (green → yellow → red) gives an instant visual representation of quiet, moderate, and loud sound levels without reading numbers.
No installation needed
Works in any modern browser — just grant microphone permission and the meter starts instantly.
Frequently asked questions
Is this a calibrated professional sound level meter?
No. This is an approximate relative noise indicator using your device microphone. Microphone sensitivity and position vary significantly between devices, so readings are not calibrated to absolute acoustic standards. For professional acoustic measurements, use a calibrated SPL meter.
What does dB mean in a noise level context?
Decibels (dB) measure sound intensity on a logarithmic scale. Whisper: ~30 dB. Normal conversation: ~60 dB. Traffic: ~70–85 dB. Power tools: ~90–100 dB. Prolonged exposure above 85 dB can cause hearing damage.
How accurate is browser-based decibel measurement?
The meter provides an effective real-time ambient noise relative reading based on your microphone input, ideal for assessing general noise levels.
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