How does a loudspeaker use an electrical supply to produce sound waves?

1 Answer
Mark C.
Nov 8, 2017

The loudspeaker has three parts: a coil, a magnet both weigh a lot so speakers are heavy) and a ‘cone’.

Explanation:

When a varying current passes through the coil (the signal from the device) it generates a varying magnetic field. This makes the magnet in the loudspeaker move. The cone is connected to the magnet and amplifies the sound by making air move back and forth, which we perceive as sound.

A diagram will help:

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