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.
Rose DE, Kurdziel S, Olsen WO, Noffsinger D. Bekesy Test Results in Patients With Eighth-Nerve Lesions: Forward Reverse- and Fixed-Frequency Tracings. Arch Otolaryngol. 1975;101(6):373–375. doi:10.1001/archotol.1975.00780350037009
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