Auditory streaming of tones of uncertain frequency, level, and duration
An-Chieh Chang1, Robert A Lutfi1, Jungmee Lee1
1Auditory Behavioral Research Lab, Department of Communicative Disorders, University of Wisconsin, Madison, Wisconsin 53706, USA achang5@wisc.edu, robert.lutfi@wisc.edu, jungmee.lee@wisc.edu.
Abstract:
Stimulus uncertainty is known to critically affect auditory masking, but its influence on auditory streaming has been largely ignored. Standard ABA-ABA tone sequences were made increasingly uncertain by increasing the sigma of normal distributions from which the frequency, level, or duration of tones were randomly drawn. Consistent with predictions based on a model of masking by Lutfi, Gilbertson, Chang, and Stamas [J. Acoust. Soc. Am. 134, 2160-2170 (2013)], the frequency difference for which A and B tones formed separate streams increased as a linear function of sigma in tone frequency but was much less affected by sigma in tone level or duration.
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