William Du Bois Duddell and the "Singing Arc"(1899)Arkiveret 22. august 2012 hos Wayback Machine Citat: "...During his experiments Duddel found that by varying the voltage supplied to the lamps he could create controllable audible frequencies from a resonant circuit caused by the rate of pulsation of exposed electrical arcs..."
plasmatweeter.de
DIY Plasma Tweeter. .... not for beginnersArkiveret 5. oktober 2011 hos Wayback Machine Citat: "...It is really simple. It is a modulated RF power amp with a controlled ionic discharge. By modulating the oscillator with the audio signal the flame size changed and so the air pressure changed also . You hear the sound directly through the air without modulating a diaphragm...it is the cleanest sound I ever heard..."
web.archive.org
DIY Plasma Tweeter. .... not for beginnersArkiveret 5. oktober 2011 hos Wayback Machine Citat: "...It is really simple. It is a modulated RF power amp with a controlled ionic discharge. By modulating the oscillator with the audio signal the flame size changed and so the air pressure changed also . You hear the sound directly through the air without modulating a diaphragm...it is the cleanest sound I ever heard..."
William Du Bois Duddell and the "Singing Arc"(1899)Arkiveret 22. august 2012 hos Wayback Machine Citat: "...During his experiments Duddel found that by varying the voltage supplied to the lamps he could create controllable audible frequencies from a resonant circuit caused by the rate of pulsation of exposed electrical arcs..."
