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Date: 09/01/01 at 7:02 AM
Posted by: Mags
E-mail: cfkam@rocketmail.com

I am trying to make a circuit that will take input from a microphone (which has background sounds + output from speakers), and the actual signal which goes to the speakers, and from that extract the background sound alone. Is it possible to isolate this background sounds using a microphone and a differential circuit and the other input from the pre-amp output?

For audio volume, would I be predominantly concerned with the power of the signal, the decibels of the signal or just the voltage of the signal? I have been unable to find any good resources for understanding the fundamentals of audio signals and microphones. If you can direct me somewhere I would be extremely grateful!

Thank you.

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