<https://www.hearchattanooga.com/hearing-loss-articles/a-short-biography-of-raymond-carhart-the-father-of-audiology/#article>
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"A Short Biography of Raymond Carhart, the “Father of Audiology”"
<https://www.hearchattanooga.com/hearing-loss-articles/a-short-biography-of-raymond-carhart-the-father-of-audiology/>