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Unformatted text preview: Review Diagnostics II z Otoacoustic Emission (OAE) Low-level acoustic signal of cochlear origin recorded in ear canal. Caused by rocking motion of OHCs Used for audiometric screening of newborns Not a measure of hearing z Auditory Brainstem Response (ABR) An electrical signal measured on the scalp Caused by synchronous firing of neurons in the auditory brainstem Used for diagnostic assessment of difficult to test patients Not a measure of hearing Hearing Instruments Hearing instruments include Traditional hearing aids Implanted devices Assistive listening devices They benefit individuals with Conductive hearing loss Sensorineural hearing loss Profound hearing loss The ideal aid would Amplify only inaudible sounds Amplify speech relative to background noise History of Hearing Aids, 1800s z Popular in the 1800s z Amplification through sound funneling Hearing Trumpets History of Hearing Aids, 1800s Hearing Trumpets History of Hearing Aids, 1800s Hearing Trumpets History of Hearing Aids, 1800s Hearing Trumpets History of Hearing Aids, 1800s...
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This note was uploaded on 03/21/2012 for the course COM DIS 110 taught by Professor Weismer during the Fall '08 term at Wisconsin.
- Fall '08