A Case for Mid-frequency Amplification?

Most individuals with hearing loss are affected mostly in the high frequencies. And, because consonants–those phonemes (distinctive speech sounds) that are believed to enable humans to differentiate one word from another–are high-frequency sounds, hearing aid fitting formulas universally call for high-frequency amplification. This continues to be a take-off of the old “audiogram fitting” approach (although with less…

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Audition and Vision

Many years ago I purchased a small book titled “Some Relations Between Vision and Audition” by J. Donald Harris. It was published in 1950, and I purchased it at the publisher’s year-end book sale, where they were attempting to empty their stock of no longer moving product. I recall that I paid $1.00 for the…

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