Abstract
To evaluate the ability of a restricted range of auditory-nerve fibers to encode a large perceptual dynamic range, Viemeister [(1983). Science 221, 1206-1208] examined the detection of a change in the level of a high-frequency band of noise flanked by more intense fixed-level noise maskers. Here, stimuli and procedures similar to Viemeister's were used, but random manipulations of level and notch cutoff frequency were included to evaluate predictions of energy-based models. The results indicate that cues other than the change in level per se are available, and suggest the potential contribution of changes in pitch/timbre for this task.
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