Gray Matters by Stuart Carlson and Jerry Resler

Gray Matters

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  1. Saucy1121

    Saucy1121 GoComics PRO Member said, about 4 years ago

    Feedback is caused when amplified sound leaks back out of the ear, is captured by the hand and re-amplified.

    Hearing aids can’t be totally air tight as that would be uncomfortable and result if poor sound to the wearer. To get an idea of what I mean, plug your ears and speak. Your own voice will echo. Venting helps reduce that, but makes a path for sound to leak back out.
    Today’s hearing aids are better at reducing feedback through digital cancellation, but it can still occur. There is also a trend to more “open” fittings that mean more leakage. In general, the worse the loss, the more likely you are to have the feedback.

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