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December 17th, 2008 - Adventures in Engineering — LiveJournal
The wanderings of a modern ronin.

Ben Cantrick
  Date: 2008-12-17 10:25
  Subject:   DIY Plasma Arc Speaker
Public
  Tags:  reddit

Are you tired of those old black speakers that only just make sounds? Maybe sound reactive lights are just not enough to impress you? How about a Plasma Speaker? A plasma speaker is a device that generates a high voltage electrical arc that makes purple light and music!

http://www.instructables.com/id/Build_A_Plasma_Speaker/

Includes video of plasma speaker in action. Tesla would be proud.

Plasma speakers (sometimes called flame speakers if the source of the plasma is combustion rather than gas ionization) are a form of loudspeaker which vary the intensity of a plasma, rather than using a magnetic field to push or pull a conventional driver, to create compression waves in air (which a listener perceives as sound).

http://en.wikipedia.org/wiki/Plasma_arc_loudspeaker

See also: Tesla coil Super Mario Bros theme duet
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