The Mysterious Cartilaginous/Bony Ear Canal Junction

Research related to the occlusion effect (OE) suggests that the OE is minimized when contact of the ear insert (closed coupled in this case) is made with the bony ear canal1,2.  Measurements of the OE for various in-canal devices are numerous and essentially support this conclusion.  But, to what extent does the cartilaginous/bony ear canal…

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How Stiffness and Mass Impact the Audiogram

A number of years ago, an article was published describing the importance of the impedance formula in interpretation of audiograms1.  The article by Campbell offered a fairly simple and visible way to help understand the audiogram, based on stiffness and mass, and the impact of these two elements on conductive hearing loss.  It is recognized…

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