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How many streams?
The gradual build and decay of auditory streaming has been
measured, and the persistence of stream biasing is reported
to be about 4 seconds , but once streams have formed,
what happens when a tone sequence in a different frequency
range is added to the pattern?
If you take four tones, A,B,C,D in two clusters, separated by
say, 3, 7 and 3 semitones (similar to stimuli used in )
0s 4s 8s 12s
A/B - _ - _ - _ - _ - _ - _ - _ - _ - _ - _
C/D - _ - _ - _ - _ - _ - _ -
(numbers of tones not to scale in this diagram;
labels 1, 2, &c are 4sec apart)
0s: A and B form one stream
4s: A and B split into two streams
8s: Now what? - Are there one, two, or three streams?
Does the whole system reset and form a single
stream, or do C and D form one stream while
A and B rejoin to form another, or do A and B
remain segregated while C and D begin fused.
12: Now do we have two streams or four?
Can the presence of C and D prevent A and B from
any leads/references appreciated,
----------------------- /\/\/\/- -------------------------------------
 A.S. Bregman (1978) "Auditory streaming is cumulative"
Journal of Experimental Psychology: Human Perception
and Performance 4:3,380-387
 M.W. Beauvois and R. Meddis (1997) "Time decay of auditory
stream biasing" Perception and Psychophysics 59:1,81-86
 W.L. Rogers and A.S. Bregman (1998) "Cumulation of the
tendency to segregate auditory streams: Resetting
by changes in location and loudness" Perception and