Abstract
When a sequence of two tones is presented over headphones in an ascending or descending order of pitch, it is heard as correspondingly ascending or descending in space. The illusion of spatial change that accompanies pitch change can be induced onto a pair of noise bursts by presenting them in synchrony with the tones. When cues known to produce stream segregation are introduced, the perceived position of the noises is less influenced by the tones. Stream organization is seen to be implicated in the ability to separately localize concurrent sources of sound. This suggests that “what” and “where” decisions are highly interactive and that neurological evidence that suggests separate pathways for these decisions must be interpreted with caution.
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The research was supported in part by grants from the National Research Council of Canada and the FCAC program of the Quebec Ministry of Education.
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Bregman, A.S., Steiger, H. Auditory streaming and vertical localization: Interdependence of “what” and “where” decisions in audition. Perception & Psychophysics 28, 539–546 (1980). https://doi.org/10.3758/BF03198822
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DOI: https://doi.org/10.3758/BF03198822