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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Hearing Aids and Further Hearing Loss? Part V

Predicted PTS (Permanent Threshold Shift) From Hearing Aid Use Various researchers have utilized data from TTS (Temporary Threshold Shift) and ITTS (Integrated Temporary Threshold Shift) in formulae that have included the length of time worn during the day, number of years worn, age at which the aid was first worn, the gain level used, and…

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