Audio Decibel Meter & Sound Level Monitor
Real-time acoustic loudness measurement using microphone Web Audio RMS with peak tracking and OSHA safety alerts.
Audio Decibel Meter & Sound Level
Real-time acoustic loudness measurement using browser Web Audio RMS
How to Use Audio Decibel Meter & Sound Level Monitor
1. Activate Microphone
Click "Start Meter" to measure ambient room sound levels using native Web Audio Analyser nodes.
2. Monitor Live Sound Pressure
View real-time sound levels in decibels (dB), tracking current, peak, and average ambient noise.
3. Compare to OSHA Safety Standards
Check the live meter against everyday sound benchmarks (whisper, quiet office, traffic, loud concert).
How This Utility Works
Precision browser-based sound level meter calculating Root Mean Square (RMS) dBFS loudness in real-time. Features peak level hold, rolling average monitor, responsive analog-style meter, and OSHA hearing hazard threshold warnings.
Audio oscillators and microphone frequency spectrum analyzers process data in volatile RAM via Web Audio API. Audio streams are never recorded or saved.
Frequently Asked Questions
How accurate is this decibel meter?
It provides a reliable approximation calibrated to standard built-in computer and mobile microphone acoustic profiles.