Android decibel meter

Question

I want to create an application that can use a telephone microphone to get the amount of external noise in dB. What is the easiest way to do this?

Answer 1

Check out one of two projects at code.google.com:

http://code.google.com/p/moonblink/wiki/Audalyzer

http://code.google.com/p/splmeter/

where, since recent projects have used this form to calculate sound pressure values:

http://en.wikipedia.org/wiki/Sound_pressure