OpeNoise
Arpa Piemonte Tools
Noise level meter
- Rating
- 4.3
- 284 ratings
- Downloads
- 101K+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Sep 22
- 2026 · v3.4.0
Screenshots
About OpeNoise
OpeNoise is a real-time noise level meter.
TECHNICAL SPECIFICATIONS:
- Real-time A-weighted sound pressure level measurement
- Minimum and maximum level
- Third octave and FFT analysis
- Data saving in text file
- Calibration
TERM OF USE
This app is not intended for professional use, it does not necessarily guarantee an accurate noise measurement.
Since each device has a different response to noise, a comparison with a professional noise level meter in the measurement dynamic range is required.
The utilization of the app requires adequate technical knowledge and skill; an extemporary measurement might not be correct.
CREDITS
Developers: Arpa Piemonte (Regional Agency for the Protection of the Environment of Piedmont - Italy - www.arpa.piemonte.it).
The code is open source under GNU v.2 license or later, the code is on GitHub: https://github.com/Arpapiemonte/
OLD VERSION
It's possible to install the old version (v1.1) at this link (uninstall the old version before): https://www.arpa.piemonte.it/approfondimenti/temi-ambientali/rumore/rumore/openoise_2/openoise_old_version_1.1
KEYWORDS
noise level meter, level, sound, noise, measure, measurement, dB, db, dBA, dB(A), decibel
TECHNICAL SPECIFICATIONS:
- Real-time A-weighted sound pressure level measurement
- Minimum and maximum level
- Third octave and FFT analysis
- Data saving in text file
- Calibration
TERM OF USE
This app is not intended for professional use, it does not necessarily guarantee an accurate noise measurement.
Since each device has a different response to noise, a comparison with a professional noise level meter in the measurement dynamic range is required.
The utilization of the app requires adequate technical knowledge and skill; an extemporary measurement might not be correct.
CREDITS
Developers: Arpa Piemonte (Regional Agency for the Protection of the Environment of Piedmont - Italy - www.arpa.piemonte.it).
The code is open source under GNU v.2 license or later, the code is on GitHub: https://github.com/Arpapiemonte/
OLD VERSION
It's possible to install the old version (v1.1) at this link (uninstall the old version before): https://www.arpa.piemonte.it/approfondimenti/temi-ambientali/rumore/rumore/openoise_2/openoise_old_version_1.1
KEYWORDS
noise level meter, level, sound, noise, measure, measurement, dB, db, dBA, dB(A), decibel
User reviews
Simple interface measures, displays, and saves weighted noise levels over brief or prolonged time intervals; originally intended to compute the noise level generated by road traffic but adaptable for other uses.
Did almost exactly what I needed it to with a clean usable interface. Only complaint is that I can't figure out how to save recorded data. Probably something simple I am missing. Thanks for the great open source app! edit: thanks for the response!
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