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The International Standard Reference Zero
A Clinical Method for Calibrating the Bone ROBERT E ROACH
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acoustic acuity air conduction air-conduction thresholds Amer American Standard American Standards Association attenuation audio audiogram audiologist Audiology Auditory Test average Bekesy bone conduction bone conduction audiometry bone vibrator bone-conduction thresholds calibration Carhart clinical clinician cochlear conduction thresholds coupler deafness decibels difference ear canal earphone Figure frontal bone hearing level hearing loss impairment intensity Jerger Laryngoscope left ear listeners lists masking noise mean threshold ment meter method microbar middle ear monaural noise level non-test ear normal hearing occlusion effect Otolaryng Otolaryngology otosclerosis output patient percent presbycusis present problem procedure pure tone pure-tone range RAYMOND CARHART recorded reference level reference threshold reinforcement response right ear SAL test screening sensorineural signal sound pressure level speech audiometer spondee threshold standard deviations stapes fixation stimulus subjects Table test ear test frequency threshold level threshold shifts tion unoccluded values variability white noise