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How do microphones work?

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2015-05-31 21:21:42

A microphone is a device that converts sound as

acoustical pressure waves into electrical

voltage waves. All microphones have a diaphragm, membrane, or

other mechanical elements in them that vibrates sympathetically in

response to the arriving acoustic wave fronts. This mechanical

element acts on the electrical element to generate audio

voltage.

The sensitivity of a microphone is shown in voltage per sound

pressure (mV / Pa) that show the proportionality of the audio waves

to the pressure waves.

To amplify sounds (make louder), the vibrations of the connected

speaker's surface must increase in amplitude.


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