Abstract
As using recruitment phenomenon, SISI test and Bekesy audiometry are employed to differentially diagnose both the cochlear hearing loss and the retrocochlear hearing loss. The main purpose of this study is to find out the sensitivity and specificity of the SISI test within the scope of 1 KHz to 4 KHz in diagnosing various types of hearing losses. In this study, the Bekesy audiometry was conducted for Bekesy audiograms of certain groups according to Jerger's classification, which included persons with normal hearing and patients with hearing impairment. Subject persons of the SISI test were categorized into the several groups with normal hearing, mild hearing loss, moderate hearing loss, moderate-severe hearing loss and severe hearing loss, respectively. The sensitivity and specificity of certain groups were evaluated according to the SISI scores of 20 % below, 25 <TEX>${\sim}$</TEX> 65 %, and more than 70%. Also, the Bekesy audiometry is conducted on the several subject groups with normal hearing, mixed hearing loss, and sensori-neural hearing loss.
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