Electronics Engineering

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


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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