Decibel Meter
Free online decibel meter using your phone's microphone. Measure sound levels in real-time, perfect for concerts, noise monitoring, and audio testing. Privacy-first: audio processed locally only.
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dB
Reference Levels
0-30 dB: Whisper, rustling leaves
30-60 dB: Normal conversation
60-80 dB: Busy street, vacuum cleaner
80-100 dB: Concert, power tools
100+ dB: Jet engine (dangerous)
About Decibel Meter
How does it work?
- Allow Microphone Access: When prompted, tap "Allow" to grant microphone permission.
- Start Measuring: Tap the "Start" button to begin real-time decibel measurement.
- Watch the Meter: The gauge shows current noise level in dB (decibels).
- Privacy First: All audio is processed locally on your device. Nothing is uploaded to any server.
Understanding Decibel Levels
- 0-30 dB: Very quiet (whisper, rustling leaves)
- 30-60 dB: Moderate (normal conversation)
- 60-80 dB: Loud (busy street, vacuum cleaner)
- 80-100 dB: Very loud (concert, power tools)
- 100+ dB: Dangerously loud (jet engine)
Tips
- Keep your phone at arm's length for accurate readings.
- Avoid touching the microphone area.
- Results may vary based on device hardware.
Frequently Asked Questions
Decibel Meter — Free online decibel meter using your phone's microphone. Measure sound levels in real-time, perfect for concerts, noise monitoring, and audio testing. Privacy-first: audio processed locally only.
Open Decibel Meter in your browser, follow the on-page controls, and get results instantly. No installation is needed.
Yes. It is free to use online with no paid subscription required for core features.
Yes. Open the page in a modern mobile browser. Some hardware tests work best on desktop.
No account is required for basic use. Logging in is optional and used for saving scores or history on some tools.