How does a speaker and a microphone work in opposite ways?

In: Science, Inventions, MP3 Players Audio and Sound Systems

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A microphone converts sound into electrical impulses. A speaker converts electrical impulses into sound.

Because they both work on the same principle, a changing electrical field (the audio signal) in a coil causes a magnet within the coil to vibrate in tandem. The magnet is attached usually to a paper cone which allow our ears to hear the sound. The converse is also true. For example if you talk into a headphone it causes the magnet to vibrate which produces an electrical signal in the coil which is connected to the headphone cable.

First answer by Redbeard. Last edit by ID1062667014. Question popularity: 37 [recommend question]

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