deciBel

deciBel


deciBel is the result of a serious effort to make an Android based SPL meter as close to a professional-grade device as the phone hardware limitations allow.

It uses a Fast Fourier Transform algorithm to implement a high precision A weighting filter and sophisticated digital signal processing techniques to achieve the best possible SPL readings out of your Android phone or tablet.

It displays the current, maximum and minimum values in decibels, and generates 3 kinds of sound pressure level versus time charts. The display can be turned upside down to allow pointing the mic at the sound source.

deciBel is supported by ads.

### Please calibrate before the first use! ###

Features:

- true A-Weighting (ANSI S1.4)
- simple calibration interface
- numeric dB, dBmin and dBmax display
- sliding sound level versus time chart
- sliding max, min and average soud level versus time chart
- accumulated sound level exposition chart (dosimeter)
- saves chart screen shots to the SD card
- dominant frequency display
- 22Khz bandwidth at the input of the weighting filter
- 1024 point real time FFT and digital sound processing
- movable to the SD card

Recent changes:
Bug fixes
Add to list
Free
71
3.6
User ratings
3701
Installs
500,000+
Concerns
1
File size
1760 kb
Screenshots
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About deciBel
deciBel is the result of a serious effort to make an Android based SPL meter as close to a professional-grade device as the phone hardware limitations allow.

It uses a Fast Fourier Transform algorithm to implement a high precision A weighting filter and sophisticated digital signal processing techniques to achieve the best possible SPL readings out of your Android phone or tablet.

It displays the current, maximum and minimum values in decibels, and generates 3 kinds of sound pressure level versus time charts. The display can be turned upside down to allow pointing the mic at the sound source.

deciBel is supported by ads.

### Please calibrate before the first use! ###

Features:

- true A-Weighting (ANSI S1.4)
- simple calibration interface
- numeric dB, dBmin and dBmax display
- sliding sound level versus time chart
- sliding max, min and average soud level versus time chart
- accumulated sound level exposition chart (dosimeter)
- saves chart screen shots to the SD card
- dominant frequency display
- 22Khz bandwidth at the input of the weighting filter
- 1024 point real time FFT and digital sound processing
- movable to the SD card

Recent changes:
Bug fixes

Android Market Comments
A Google User
Aug 12, 2015
Doesn't measure above 90db I think it's due to the agc built into Android. The app doesn't measure any higher than 90dB.. Nice if there was a way to turn off the automatic gain control for Android's microphone.
A Google User
Aug 9, 2015
Best in its class Provides the most data while optimizing the simplicity of display of said data. I bet pro version is even better!
A Google User
Jul 30, 2015
Wow this is way better than other sound apps... Wow... way better than other sound apps...you can see the frequency coming in...very cool...can read relative decibels easily
A Google User
May 28, 2015
maximum level what is a maximum SPL level is measured by this app..?? and is this depends on the mic type ?? thank you.
A Google User
Mar 19, 2015
Decibel Cool! Does what it says.