Abstract
Changing the time separation between two trains of filtered pulses, each at the same basic repetition rate, makes it evident that there is a pitch which is correlated with the magnitude of the time separation. When both trains of pulses are at 30 db sensation level, decreasing the intensity of one train of pulses by 10 db results in a noticeable asymmetry in the production of the “time‐difference” pitches. That is, the “time‐difference” pitches are much stronger when the pulses of the less intense train are in the second half of the interval between the pulses of the more intense train. No differences in spectra of the stimuli have been found which could explain this asymmetry.

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