CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Loudspeaker soundwave. Cut-away computer illustration showing a loudspeaker producing sound. An electrical signal is sent to a voice coil (copper), which is surrounded by a magnet. As the coil vibrates with the electrical signal it moves the diaphragm (grey, right), producing the air pressures waves that produce sound.
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