My Shaver Sings Again

Posted by AJ Harbison at 4:28 am

As I wrote about in my previous post regarding my electric shaver and the vent fan, when my electric shaver is on it sounds a definite pitch (I’ve never bothered to check what note it is, unlike some other instances). The interesting thing is, the pitch it sounds creates a harmonic above it, and the harmonic is the interval of a tenth–an octave displacement of a major third:

And you can listen to it in the player below:

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A much nicer sound than the minor ninth, to be sure. But I wonder why the shaver creates a harmonic.



  1. Gravatar

    Idhrendur on 07.03.2008

    I have some guesses, but I’d have to take your shaver apart to be sure. And as a kid, I proved I’m not always so good at putting things back together, so I think you don’t want me to do that.

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