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.
Parker W, Decker RL. Detection of Abnormal Auditory Threshold Adaptation (ATA). Arch Otolaryngol. 1971;94(1):1–7. doi:10.1001/archotol.1971.00770070037001
Monkeypox Resource Center
Customize your JAMA Network experience by selecting one or more topics from the list below.