Variables affecting the angular displacement threshold of simulated auditory movement.

Abstract

The angular displacement threshold of auditory movement simulated by a linear step-wise change in interaural time delay was determined under various conditions. Variables investigated were: (a) signal noise bands of 106-1200 cps and 2400-3400 cps, (b) movement originating at the median and lateral planes, and (c) six different velocities of movement ranging from a perceptually slow to fast movement. Lower thresholds were obtained with the low frequency noise band, and for both noise bands lower thresholds were obtained for simulated movement from the median plane. The threshold is directly related to the velocity of movement; the threshold increases as the velocity of simulated movement increases.