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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Hearing Aid Evolution VI – Hearing Aid Coupling

Hearing Aid Coupling From an historical point of view, the history of coupling a hearing aid processor to deliver sound to the ear might be ordered as follows: (1) stock ear coupling, (2) custom earmolds, (3) imaging, and (4) same-session coupling. The purpose of an earmold/earpiece is to direct sound to the tympanic membrane without…

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