Settings
Calibration and preferences
Appearance
Choose your preferred theme
Calibration Offset
Adjust the dB offset to calibrate your device against a reference meter.
dB
Positive values increase readings, negative values decrease them.
A-Weighting (dBA)
Apply A-weighting filter to better match human hearing perception.
About Calibration
Phone and computer microphones are not designed for accurate sound level measurement. Results are approximate and should not be used for professional or safety purposes.
For best results, calibrate against a professional SPL meter by comparing readings in the same environment.
About Soundr
Version 1.0.0
Soundr is a free, open-source web application for measuring sound levels and generating audio tones.
Built with React, TypeScript, and the Web Audio API. Works offline as a Progressive Web App (PWA).
Features
- • Real-time decibel measurement
- • History graph with min/avg/max stats
- • Noise level descriptions and examples
- • Tone generator (20 Hz - 20 kHz)
- • Multiple waveforms (sine, square, triangle, sawtooth)
- • Frequency presets and hearing tests
- • Calibration offset adjustment
- • Works offline (PWA)
- • No ads, no tracking, no data collection