How Does a Speaker Make Sound?

A speaker is a paper cone with a coil of wire glued to its back, sitting inside a magnet. Electricity turns the coil into a magnet too, so it is pushed and pulled, and the cone squashes the air into waves that your ear hears as sound. 00:00 A cone that can only move 00:32 Coil, magnet and squashed air 01:11 Bass, treble, and a microphone 02:23 Rice and Kellogg, 1925 Hidden Machines opens up everyday things to show how they really work. #howitworks #engineering #sound