What it measures
The browser estimates sound level from microphone RMS amplitude and displays current, average, peak, and recent range values.
Microphone sound meter
Online decibel meter
Use dBmeter as a free browser dB meter for quick sound checks at home, in the studio, at work, or in a classroom. The measurement runs locally on your device and can be calibrated against a trusted SPL meter.
How to calibrate
Place a reference sound meter near your device and adjust the offset until both tools show the same dB SPL reading.
When to use it
Use it for comparisons and education. Use certified instruments for legal, medical, or occupational exposure decisions.