SLHS 21500 Chapter Notes - Chapter Unit 2: Conductive Hearing Loss, Immittance, Perforated Eardrum

• School: Purdue University
• Department: Speech, Lang & Hear Science
• Course: SLHS 21500
• Professor: Krishnan Preethi

Document Summary

50% of the time) are measured for pure tones at different test frequencies: audiometer: primary instrument used to measure hearing threshold. Frequency selector dial: allow the audiologist to select different pure-tone frequencies (usually 125-8000hz) Hl, results can be used to classify the extent of hearing loss. Impedance: opposition to the ow of acoustic (mechanical) energy: admittance: the relative ease with which energy ows through a system, reciprocal of impedance. Immittance test battery: usually made up of tympanometry, static acoustic immittance and threshold of acoustic re ex. Ipsilateral acoustic re ex: when the re ex is both activated and measured in the same ear: conductive hearing loss tends to either elevate or eliminate the re ex response. 80%: x-linked: sex-linked, deafness that is determined by genes located on the x chromosome. Identifying the chromosomes and speci c genes causing deafness can help predict and possibly resolve genetic deafness in the future.