Pure tone delayed auditory feedback: development of criteria of performance deterioration.

Delayed auditory feedback audiometry, employing pure tones and a keytapping task, was administered at sensation levels from -10 to +50 dB to a sample of the general adult population. Absolute and relative time error as well as pattern error criteria were established on the basis of the -10-dB performances. Ninety percent of the subjects demonstrated tapping errors at sensation levels within 10 dB of auditory threshold.