deciBel Pro

deciBel Pro


deciBel Pro 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 high precision A, B, C and Z weighting filters 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.

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

Features:

- true A, B, C and Z Weighting (ANSI S1.4)
- numeric dB, dBmin and dBmax display
- simple calibration interface
- Automatic Calibration function (no professional SPL meter required for reasonable startup accuracy)
- sliding sound level versus time chart
- sliding max, min and average soud level versus time chart
- accumulated sound level exposition chart (dosimeter)
- saves chart screenshots 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

Recent changes:
Notification area icon added
Performance improvements
User interface improvements
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$3.60
84
4.2
User ratings
23
Installs
1,000+
Concerns
0
File size
506 kb
Screenshots
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About deciBel Pro
deciBel Pro 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 high precision A, B, C and Z weighting filters 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.

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

Features:

- true A, B, C and Z Weighting (ANSI S1.4)
- numeric dB, dBmin and dBmax display
- simple calibration interface
- Automatic Calibration function (no professional SPL meter required for reasonable startup accuracy)
- sliding sound level versus time chart
- sliding max, min and average soud level versus time chart
- accumulated sound level exposition chart (dosimeter)
- saves chart screenshots 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

Recent changes:
Notification area icon added
Performance improvements
User interface improvements

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User reviews of deciBel Pro
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Android Market Comments
A Google User
Sep 27, 2013
A google User Great tool, though the kids maxed it out at 99.9.! Though cant find the calibration menu.?? Will have to test it against my audiologist prof sound meter
A Google User
Jul 11, 2013
Top! Accurate and well designed. Visualization great!
A Google User
Jun 5, 2013
Phone locks up after first use.
A Google User
Jun 30, 2012
Good accuracy After calibrating the accuracy is quite good. Whish it could record over long time and save to CSV. Also landscape mode would be nice.
A Google User
Jun 30, 2012
Good accuracy After calibrating the accuracy is quite good. Whish it could record over long time and save to CSV. Also landscape mode would be nice.