Subject: Re: perceptual equivalence of polarity inverted waveforms From: Richard M Warren <rmwarren(at)CSD.UWM.EDU> Date: Thu, 25 Feb 1999 16:51:02 -0600On 23 Feb 1999, B. Suresh Krishna wrote: > >Is there any published literature on differences (or the lack thereof) in >the perception of waveforms as compared to their inverse polarity >counterparts? > >I always believed that it was fundamental dogma that there weren't any; >but have not been able to find this substantiated (or refuted) anywhere, >despite extensive searching. > Evidence concerning the perceptual equivalence of polarity inverted waveforms is furnished by complex periodic sounds in which one half-period is the polarity inverted restatement of the other. Conditions under which this equivalence can be observed is of interest because of the implications concerning temporal and spectral auditory analyses. See (1) Warren & Wrightson, JASA, 1981, 70, 1020-1024, (2) Warren, Bashford, & Brubaker (Experiment 7), JASA, 1989, 86, 116-125, (3) Warren, Auditory Perception: A New Analysis and Synthesis, Cambridge University Press, 1999 (pp. 84-88). Dick