Evolution of Electroacoustic Measures of Hearing Aids

H. Christopher Schweitzer, Ph.D. Dr. Schweitzer is Director, HEAR4-U International and Technical Consultant for IMH Corporation.   In a previous post, Dr. Schweitzer discussed accuracy and reliability of hearing threshold measurements, describing the inaccuracies and problems that exist with current methods.  That hearing aids are fitted based on poor baseline information has led to the…

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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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