Tone decay test | definition of tone decay test by Medical dictionary
tone decay test
tone de·cay test
the sounding of a continuous tone at threshold for 1 min; if the intensity must be increased by more than 5 dB for continued perception, it is indicative of a neural hearing loss.
tone decay test Audiology A hearing test that evaluates defects in adaptation to sounds, formally known as auditory fatigue–tone decay, which indicates a defect in retrocochlear transmission of nerve impulses from the ear, possibly caused by pressure or 8th cranial nerve damage. See Acoustic nerve.