How does the coil in a microphone turn sound into electric current?

How does the coil in a microphone turn sound into electric current?

The coil in a microphone is attached to a movable surface that is pushed back and forth by the sound. Near the coil is a magnet so that, as the coil moves, the magnet induces electrical currents in it. Whenever a magnet moves past a coil of wire or a coil of wire moves past a magnet, a current is induced in that coil of wire.

How is sound made by a speaker?

How is sound made by a speaker?

As the current passing through the speaker’s coil changes, the speaker cone moves back and forth toward or away from the speaker’s permanent magnet. This moving cone pushes or pulls on the air, creating compressions and rarefactions that propagate through the air as sound.