Z Decibel…..

Audiologists in any part of the world know and usually understand the decibel, as it is an integral component of an education in Audiology.  Some learned this complex concept from basic Audiology textbooks, classroom instruction or, possibly, Chuck Berlin’s  classic “programmed learning” booklet from the 1970s.   The Bel, named for Alexander Graham Bell is too large a measure to be…

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The Law of Audiometric Assessment

The one course that challenges most audiology students no matter where in the world they study is Psychoacoustics.  Psychoacoustics and the Just Noticeable Differences (JNDs) and Just Not Noticeable Differences (JNNDs) have mystified audiologists, otolaryngologists, and hearing researchers for over 150 years.  Where did JNDs come from?  Who started these concepts?  These are the questions for this week’s…

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