OpeNoise
Free
3.3.0for iPhone, iPad
Age Rating
OpeNoise 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
- Displaying measurements on a map
- Metadata compilation
- Sharing calibration and measurements with the OpeNoise community
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.
The calibrations and measurements sent to the OpeNoise community will be used for statistical purposes only and cannot be used in any way to verify compliance with legal limits.
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/
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
- Displaying measurements on a map
- Metadata compilation
- Sharing calibration and measurements with the OpeNoise community
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.
The calibrations and measurements sent to the OpeNoise community will be used for statistical purposes only and cannot be used in any way to verify compliance with legal limits.
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/
KEYWORDS
noise level meter, level, sound, noise, measure, measurement, dB, db, dBA, dB(A), decibel
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What's New in the Latest Version 3.3.0
Last updated on Jan 7, 2026
Old Versions
performance improvement and minibug resolution
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Version History
3.3.0
Jan 7, 2026
performance improvement and minibug resolution
OpeNoise FAQ
Click here to learn how to download OpeNoise in restricted country or region.
Check the following list to see the minimum requirements of OpeNoise.
iPhone
iPad
