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Re: perceptual segregation of sound

With regard to whether we can "process" more than one acoustical signal simultaneously, the discussion should take account of a couple of early demonstrations that people can listen for more than one frequency at the same time, as though they were paying attention to two separate auditory "filters" tuned to attend to each. The relatively small loss in detectability in such a case corresponds to the added "noise" in the alternative channel while both are attended. The data are incompatible with any model involving time-switching between channels:
Green, D.M. (1961) JASA , 33 897-903 and Creelman, C.D. (1960) JASA, 32, 805-810.
Doug Creelman
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