Sound Decibel Meter
Real-time decibel (dB) noise level analysis using microphone input with live history graph
A local browser-based utility that accesses your microphone to measure ambient noise levels in real-time, displaying current decibel (dB) values and rendering an interactive line graph of noise trends over time.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Click the 'Start Decibel Meter' button to initialize the audio listener.
- Allow microphone access in the browser popup when prompted.
- Watch the live decibel dial react to sounds and inspect the timeline graph for noise history.
FAQ
- How accurate is this browser-based decibel meter?
- It uses the relative amplitude of the microphone input. Because microphone hardware and system volumes vary, it's best suited as a comparative estimator rather than a calibrated scientific sound level meter.
- Is my voice or audio data recorded or sent anywhere?
- No. All calculations run entirely inside your browser's Web Audio pipeline. No voice or audio data is recorded or transmitted to any server.