This sound level meter circuit can be used to control the intensity of a sound recording or in a disco. It has 5 measurement domains between 70 and 120 dB; reading accuracy is 0.5 dB. Microphone M1 is ...

The circuit is designed to measure and monitor the level of an input audio signal by displaying an on the spot reading and not the peak reading. Audio or Sound Level – refers to the intensity, amount, ...