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July 1971

Detection of Abnormal Auditory Threshold Adaptation (ATA)

Author Affiliations

From the Department of Otolaryngology, the Cleveland Clinic Foundation, Cleveland. Mr. Decker is currently with the Speech and Hearing Department, University of Akron, Akron, Ohio.

Arch Otolaryngol. 1971;94(1):1-7. doi:10.1001/archotol.1971.00770070037001

Abnormal threshold adaptation (ATA) is known to be an indication of refractory neural disease in the auditory system. Comparison of the Carhart tone-decay test, Bekesy sweep frequency, and fixed-frequency tests, and the Rosenberg and Owens modifications of the Carhart test in the same groups of patients demonstrates that the Carhart test gives more diagnostic information about the amount, rate of appearance, and final configuration of ATA at all six frequencies than the other tests. In specific instances the Carhart test may indicate neural disease where the other tests indicate sensory disease. The time consumed by this test is not appreciably different from that for the Bekesy fixed-frequency test when averaged over a group of patients.

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