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:
- New weighting filter implementation
- Save screen bug fixed
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Free
71
3.6
User ratings
3425
Installs
500,000+
Concerns
0
File size
200 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:
- New weighting filter implementation
- Save screen bug fixed

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User reviews of deciBel
Does just whats needes.
Aug 22, 2011
Awesome! Seems to work good on my Desire HD. but a feature i'd like to see is the ability to change the duration of the recording, view longer than the last 5 minutes. And even better, id like to see the average dB during the last measure. That would be awesome!
Aug 4, 2011
Great app. There are heavy physics and math under the hood.
Mar 4, 2011
works well, calibrated pretty close to my portable SPL meter. dx
Feb 22, 2011
Não é um decímetro real, mas dá pra ter uma idéia, fazer comparações. Bom
Jan 20, 2011
Android Market Comments
A Google User
May 14, 2014
Best Sound Meter for Samsung Galaxy SIII Accurate and the graph is an added plus...
A Google User
Apr 26, 2014
User-friendly, but was totally wrong at a basketball game. It read 91 db when it really was 120 db. Maybe it was my phone, but there's no way to know.
A Google User
Mar 23, 2014
Nice app
A Google User
Jan 16, 2014
Very good Good accuracy
A Google User
Jan 8, 2014
Simple and accurate