Abstract
When listeners are presented with a dichotic sequence of tones which alternate in pitch between 400 and 800 Hz, such that when one ear receives 400 Hz the other receives 800 Hz (and vice versa) many hear a single high tone in one ear alternating with a single low tone in the other. This effect is based in part on a lateralization of each fused tonal percept towards the ear receiving the 800-Hz signal. It was found that in four out of five subjects, lateralization towards the 800-Hz signal occurred even when the 400-Hz signal was substantially higher in amplitude, and clearly higher in apparent loudness. However, although this effect was prominent with sequences consisting of 20 dichotic tone pairs, it was weak with sequences consisting of two dichotic tone pairs. With long sequences, lateralization to the 800-Hz signal was also prominent even when it lagged or led the 400-Hz signal by several milliseconds.
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