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June 1975

Bekesy Test Results in Patients With Eighth-Nerve Lesions: Forward Reverse- and Fixed-Frequency Tracings

Author Affiliations

From the Section of Audiology, Mayo Clinic and Mayo Foundation, Rochester, Minn (Drs. Rose and Olsen), and the Auditory Research Laboratory, Northwestern University Medical School, Chicago (Kurdziel and Dr. Noffsinger).

Arch Otolaryngol. 1975;101(6):373-375. doi:10.1001/archotol.1975.00780350037009

Sweep-frequency Bekesy tracings, both forward (low to high frequency) and reverse (high to low frequency), as well as fixed-frequency tracings, were obtained from 18 patients who had eighth-nerve tumors (subsequently confirmed surgically).

In general, reverse-sweep frequency tracings revealed greater adaptation for continuous tone stimuli than did forwardsweep frequency tracings. However, if a search for excess adaptation (greater than 20 dB) is the sole purpose for administering Bekesy audiometry to a given patient, then fixed-frequency tracings yield adequate differential information.

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