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Plasma Speaker

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Published on Oct 29, 2018

Music from a plasma discharge. There is NO speaker in this video projecting the sound. The sound is being projected from the plasma arc discharge displacing the air as it pulsates to the audio frequiencies. The arc is being generated by an amplitude modulated radio frequency signal from a radio transmitter at a power level of approximently 400 watts. The device shown creating the arc is a quarter wave resonant transformer (Telsa Coil) in telluric mode with the lower terminal of the transformer's secondary connected to earth. No radiated signal transmitted as the apparatus was shielded within a steel building. Design form factor is by Eric Dollard and proportioned and fabricated by Bruce Gavin.
Recording of video and audio was done with a Canon EOS M camera. Only the built in microphone of the camera was used to record the sound. Note the sharp pointed tips from the plasma brush discharge when the camera finally focuses. This is an organic shape that can be found in many natural conditions. Audio chain was limited to just the narrow 4 Khz bandwidth of the exciter's AM passband. The bright light that appeared for a moment was a small florescent tube reacting to the high potential magneto dielectric field surrounding the plasma discharge.

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