Engineer Fabricio H. Franzoli of Franzoli Electronics used four tesla coils to play an interesting cover of Michael Jackson’s Billie Jean. These musical tesla coils basically produce sound by switching on / off a certain number of times per second, thus causing air molecules around it to heat up and vibrate.
With the air molecules around the tesla coils vibrating, music can then be played by simply changing the frequency. More specifically, when there are more sound waves per second, they produce a higher pitch, while fewer generates a lower pitch. With that said, it took lots of programming to create the pattern across four tesla coils for this Billie Jean cover.
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The loud music actually comes from the sparks from the tesla coil. It’s literally playing the music due to the programmed phase, pulse width and trigger frequency! So there are no speakers, no audio / video special effects. Just the drum backing track that is not played by the tesla coils. It looks even better in person and sounds almost the same, just louder than people expect,” said Franzoli.
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