Dutch of the Elm:
Where's the high frequency coming from? A 230V arc might be caused twice every cycle, i.e. once per half cycle, and that's about it (the arc current itself will follow the sine wave, where there is current flowing). So the crackling or buzzing should have a 50Hz sound to it.
No, I don't think that is correct. The frequency is much higher than a mains hum, which is two and a bit octaves below middle C. It is more like little shots firing off so you hear the frequency generated by each arc.
Dutch of the Elm:
Where's the high frequency coming from? A 230V arc might be caused twice every cycle, i.e. once per half cycle, and that's about it (the arc current itself will follow the sine wave, where there is current flowing). So the crackling or buzzing should have a 50Hz sound to it.
No, I don't think that is correct. The frequency is much higher than a mains hum, which is two and a bit octaves below middle C. It is more like little shots firing off so you hear the frequency generated by each arc.
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