SPHR 2108 Study Guide - Midterm Guide: Tympanometry, Musical Tone, Reflex Arc
7 Mar 2018
School
Department
Course
Professor
Document Summary
Check of earphone output using sound level. Relatively lightweight, sit on top of ear. Directly stimulates the organ of hearing in the inner ear, bypassing outer and middle ear. Otoacoustic emissions: sound produced by normal ,healthy cochlea. Starts process of identifying type and degree of hearing loss based on symptoms. Test results must relate to the case history. 2f average= mean best two of above. Conductive hearing loss: ac outside normal range, bc within normal limits. Sensorineural hearing loss: ac and bc thresholds equally abnormal. Able to hear low frequencies better than higher frequencies. Loss of sensitivity with diminished ability to understand speech. Mixed hearing loss: combination of a conductive and sensorineural component. Bc :outside normal within and ac even further impaired. Ex: preexisitng sensorineural hearing losss than acquires otittis media. Asymmetrical: person"s hearing sensitivity is significantly different in one ear vs the other. Sensorineural hearing loss of greater severity in higher frequencies.
