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Forward Reverse- and Fixed-Frequency Tracings

Darrell E. Rose, PhD; Sabina Kurdziel, MA; Wayne O. Olsen, PhD; Douglas Noffsinger, PhD

Arch Otolaryngol. 1975;101(6):373-375.

Abstract
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.

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).

Footnotes
Accepted for publication Dec 21, 1974.

Reprint requests to the Mayo Clinic, 200 First St, SW, Rochester, Minn 55901 (Dr. Rose).

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