Sixteen normal ears and 231 ears with sensorineural deafness were studied by forward and reverse sweep continuous-tone Bekesy audiometry. In normal ears, the tracings overlapped and this was also generally true in clinical material for cochlear deafness with loudness recruitment and slight-tone (less than 30 db) decay.
Abnormal tracings were seen more frequently in cases with lesions in the brain-base area including the auditory nerve and cerebellum. Poor reverse tracings were associated with a part of the cases with abnormally high-tone decay and incomplete or absent loudness recruitment.
Palva T, Kärjä J, Palva A. Forward vs Reversed Bekesy Tracings. Arch Otolaryngol. 1970;91(5):449–452. doi:10.1001/archotol.1970.00770040643010
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