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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What Is Unity Gain in Hearing Aids?

A hearing professional who regularly reads this Internet site recently wrote: “I hear others talking about ‘unity gain’ when describing hearing aid amplification.  What is unity gain and how is it implemented in hearing aids?”  In order to answer this question, it is first necessary to review amplification, in general. Amplification “Unity acoustic gain,” or…

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