题目内容
The voltage gain of the amplifier is the amplitude of the output voltage minus the amplitude of the input voltage.
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Microphones are devices which detect sound signals and produce a voltage or a current which is proportional to the sound signal.
When you talk into a microphone, the micro without power will produce an electrical signal.
Using a multimeter, you can measure the peak-peak amplitude of the electronical signal.
An operational amplifier circuit can amplify a sound signal.
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