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%0 Journal Article
%A Beauvois, Michael W.
%T The effect of tone duration on auditory stream formation
%D 1998
%B Perception and Psychophysics
%N 60
%P 852-861
%F Beauvois98a
%K auditory streams
%K duration
%K segregation
%K Gestalt
%X In a study in which the effect of tone duration on the
formation of auditory streams was investigated, subjects were
presented with 15-sec alternating pure-tone sequences
(ABAB...) and were asked to orient their attention over the
duration of the sequence toward hearing either a temporally
coherent or a segregated percept. At stimulus offset, the
subjects indicated whether their percept at the end of the
stimulus had been that of a temporally coherent ABAB trill
or that of segregated A and B streams. The experimental
results indicated that the occurrence of stream segregation
increases as (1) the duration of the A and B tones increases
in unison and (2) the difference in duration between the
A and B tones increases, with the duration difference between
the tones producing the strongest segregation effects. A
comparison of these experimental results with those of other
studies strongly suggests that the time interval between
the offset and onset of consecutive tones in the same frequency
range is the most important temporal factor affecting auditory
stream formation. Furthermore, a simulation of the experimental
results by the Beauvois and Meddis (1996) stream segregation
model suggests that both the tone duration effects reported
here and Gestalt auditory grouping on the basis of temporal
proximity can be understood in terms of low-level
neurophysiological processes and peripheral-channeling factors.
%1 1
%2 3
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