Fine Tuning Electret Mic Sensitivity

Electret mics are used in many applications ranging from audio systems to sound activation based systems. If the mic is too sensitive, it picks up all the background sounds which may not be desirable. In order to reduce the sensitivity of the mic so that it responds to sounds within a desired proximity,we can put a capacitor in series with the mic and a potentiometer in parallel with the capacitor to tune the mic to a desired sensitivity level.

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