Abstract
The detection of a 5-msec tonal signal presented at various delays after the onset of a 500-msec tonal masker was investigated in several transient-masking experiments. Changes in the amount of masking were measured as a function of the delay between onset of the signal and the onset of the longer-duration masker. In agreement with previous investigations of transient masking there was a large decrease in masked threshold, 26 dB in some conditions, with an increase in signal delay. A “transient overshoot” at masker termination was also noted. These data are consistent with a short-time energy-sensing model of detection. In a second transient-masking study, the masking produced by a gated sinusoid in the presence of a continuous tonal pedestal was investigated. The pedestal results indicate that a simple, linear, time-invariant, energy-detection scheme cannot account for the results of two-tone masking experiments.
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