Decibel: dB Sound Meter
Noise & Frequency Analyzer
About
This app provides precise sound level measurements and audio analysis using professional weighting filters and real-time FFT spectrum analysis. It functions as a dosimeter for workplace safety and allows for easy sharing of dB data overlays on photos.
What's New in Decibel
1.0.4
July 15, 2026
Known issue optimization fixes
Subscription plans
Weekly VIP
Pro Subscription
Developer apps
FAQ
What is Decibel's accuracy range?
Decibel offers an accuracy range of 30-130 dBA. It supports high-precision calibration with microphone gain adjustable from -50dB to +50dB for laboratory-grade accuracy.
Is Decibel suitable for workplace safety?
Yes, Decibel is designed as a NIOSH and OSHA compliant dosimeter. It automatically calculates daily noise exposure, making it an essential tool for workplace safety monitoring.
Can I share my sound measurements?
Yes, Decibel features InstaDecibel Image Overlay, allowing you to add dB data and charts to photos with one tap. These can then be shared on platforms like Instagram, Facebook, and LINE.
What professional frequency weighting filters does Decibel use?
Decibel utilizes professional frequency weighting filters including ITU-R 468, A, B, C, and Z. These filters are crucial for precise human ear perception and excellent low-frequency noise measurement.
What are the Pro Version features in Decibel?
The Pro Version, available via in-app purchase, offers unlimited history exports, advanced spectrum analyzer modes, custom calibration profiles, enhanced frequency analyzer tools, and an ad-free experience.
How does Decibel handle historical data?
Decibel provides complete history management with clear data storage. Users can export their measurements as PDF reports or M4A audio files, with unlimited exports available in the Pro Version.
Does Decibel have ads?
No, Decibel is ad-free. The application explicitly states an 'Ad-Free Experience' as a feature of its Pro Version, indicating the base version is also free of advertisements.
What devices does Decibel support?
Decibel is available for iPhone, iPad, and iPod devices. It also supports Live Activities, allowing for continuous noise monitoring directly on your lock screen.
