Before the Audiogram

Audiogram, AW’-dee-oh-gram”, (n). A record of the threshold of sensitivity of hearing measured at several different (usually discrete) frequencies{{1}}[[1]]Modified slightly from Delk, J.H. Comprehensive Dictionary of Audiology, P 35, 1973, The Hearing Aid Journal, Sioux City, IA[[1]]. Strange as it may seem to many currently measuring and recording hearing results, the audiogram did not always…

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History of Acoustic Impedance Measurement

At the AudiologyNOW! 2013 meeting in Anaheim, a group of us (Robert Margolis, Charles Berlin, Jay Hall, and myself) were invited to make a presentation on the History of Audiology (hearing testing, hearing aids, and vestibular testing).  The following is the second part of the presentation on the “History of Audiology.” Presented in the format…

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