The Human Ear Canal – III

Ear Canal Length   Most ear canal dimensional measurements relate to the length of the ear canal. However, measurements of the ear canal length are not straightforward because measurement methods vary, especially as to how the distal and proximal boundaries of the ear canal are identified. Additionally, ear canal length provides no information about the…

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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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