Abstract
Psychometric functions were obtained for detection of 500-Hz sinusoidal pulses masked by continuous wide-band Gaussian noise. Pulse durations were 0.1, 0.2, 0.5, and 1.0 sec for each of four interaural conditions—two homophasic (N0−S0 and Nπ−Sπ) and two antiphasic (N0-Sπ and Nπ-S0). As signal duration was increased from 0.1 to 1.0 sec, the decrease in signal level necessary to maintain constant detection was about 2 dB greater in the homophasic than in the antiphasic conditions. This reduction in the masking-level difference with increasing signal duration was confirmed in a follow-up study using pulse durations of 0.2, 1.0, and 4.0 sec.
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