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Global Hum

Discussion in 'audio' started by Hipper, Mar 19, 2019.

  1. Hipper

    Hipper pfm Member

  2. a.palfreyman

    a.palfreyman pfm Member

    I have long suffered (more then a decade) with tinnitus and this seems to imply it may be a similar phenomenon, i.e. "from within" rather than from external noise sources. I have only ever experienced something similar on a couple of occasions where I was left for a few moments with a deep, throbbing sound in my ears. Not loud but noticeable. That was after a period of listening to the TV via headphones and only manifest itself after removing the headphones. The only thing I could put that down to was some inaudible mains hum that caused a "latent image" (like when you stare at something, then avert your gaze to a plain surface where you will see a negative image of what you were staring at) after removal of the 'phones, but never made any measurements so can't confirm this. I also seem to get a slightly similar effect after listening to a prolonged, relatively constant deep bass note as a sort of after-effect.

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