Decibel app is a program that defines a microphone noise. You should hold your phone upside-down to perform right action. The data is displayed in both digital and analog forms.
For your information: 22 dB - complete silence; 50 dB - noise in an office environment;
120 dB - threshold of pain; 150 dB - munitions explosion.

NOTE: to use this app you’ll need Qt Libraries.

Requirements: Symbian 9.4, Symbian ^ 3, MeeGo.
Language: English.