of British Columbia) would like to hasten the application of acoustic immittance
measure by explaining to practitioners and instructors both the older familiar versions and the recently developed wideband version, also called wideband reflectance and wideband tympanometry.
findings supported the extent of extracranial complications identified on otoscopic examination.
Jerger believes that with an air-bone gap, the entire immittance
battery cannot be normal (J.
audiometry was conducted with the GSI Tympstar, and distortion product otoacoustic emissions (DPOAEs) were collected at WRAMC using the GSI Audera and at NCRAR using the Mimosa Acoustics HearID systems (Champaign, Illinois).
He presents 17 chapters covering acoustics and sound measurement, anatomy and physiology of the auditory system, measurement principles and the nature of hearing, the audiometer and test environment, pure tone audiometry, auditory system and related disorders, acoustic immittance
assessment, speech audiometry, clinical masking, behavioral tests for audiological diagnosis, physiological methods in audiology, assessment of infants and children, audiological screening, nonorganic hearing loss, audiological management, and effects of noise and hearing conservation.
Tympanometry measures the mechanoacoustic properties of the external-middle ear system in terms of acoustic immittance
(expressed in mm [H.
A comprehensive audiometric evaluation should be completed, including otoscopy, air- and bone-conduction thresholds, immittance
audiometry, ipsilateral and contralateral acoustic reflex thresholds, and contralateral acoustic reflex decay.
The audiometric findings, especially the absence of acoustic stapedial reflexes on acoustic immittance
testing, were consistent with otosclerosis.
Patients saw the audiology consult service and underwent immittance
and pure tone audiometric evaluations.
Findings on audiologic testing--including speech, speech-in-noise, acoustic immittance
, and oto-acoustic emissions studies--were within normal limits.
Normal middle-ear function was verified by means of immittance
To obtain impedance measurements in both patients, we used a GS133 immittance
bridge and a 226-Hz probe tone for tympanometry.