Decibels
UTILITIES ∙ SINCE 2010
Want to know what noise level is around you? in the restaurant? in the train? in the office? This app will show you.
Features:
- Smooth analog display of dB(A)
- Take photo with sound level display
- Share, print, and store sound level photos
Extra Features (with purchase):
- Select frequency weightings A, C, and Z
- Record decibels on beautiful strip charts
- Annotate the strip charts
- Share, print, and store the strip charts
This app uses the internal microphone to estimate the sound pressure level in decibels (dB SPL).
| Examples | |
|---|---|
| Quiet bedroom at night | 30 dB |
| Average home | 50 dB |
| Vacuum cleaner, 1m away | 70 dB |
| Jet aircraft, 50 m away | 140 dB |
Frequently Asked Questions
How accurate is the Decibels app compared to a professional sound level meter?
The Decibels app uses professional frequency weighting (A/C) and advanced algorithms
introduced in Version 3.0 to ensure high accuracy. While it utilizes the iPhone’s
built-in microphone, it provides a reliable estimation of sound pressure levels (dB SPL)
suitable for everyday use, classrooms, and music rehearsals.
Is the Decibels app free to use?
Yes, Decibels is free to download and use. We offer optional In-App Purchases for advanced features, allowing you to unlock additional professional tools if needed.
Can I use Decibels to measure noise levels in my office or classroom?
Absolutely. Decibels is perfect for monitoring ambient noise in quiet environments like offices, libraries, or bedrooms, as well as louder spaces like restaurants or trains. It helps you easily identify if the noise level exceeds a comfortable threshold.
Does the app require any external hardware to measure sound?
No external hardware is required. The app is designed to work seamlessly with the built-in microphone of your iPhone or iPad.
Does the app support A-weighting and C-weighting?
Yes, Decibels supports both A-weighting (standard for environmental and workplace noise) and C-weighting (often used for louder, low-frequency sounds like music or machinery).
How does Decibels protect my privacy?
Your privacy is our priority. Decibels processes all audio data locally on your device in real-time. We do not record, store, or transmit any audio data or personal information to external servers.
What are some common noise level examples for comparison?
To help you understand your environment, here are a few common benchmarks:
- 30 dB: Quiet bedroom at night
- 50 dB: Average home or quiet office
- 70 dB: Vacuum cleaner (1m away)
- 140 dB: Jet aircraft (50m away)
Support
Enter your Decibels support request in the form below or send an email directly to apps [at] bannach.ch .
