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Re: Autocorrelation-like representations and mechanisms

Hi Peter,

just a minor quibble, when you say:

The interesting ARO poster by Rebecca Watkinson and Chris
Plack that was mentioned involved transient phase-shifts that reminded
me a great deal of Kubovy's demonstrations of popping out by
transiently phase-shifted harmonics (when they are perceptually
separated from the rest of the harmonic complex, presumably they don't
contribute to the F0 pitch of the complex).

(my italics)

Brian Moore's work shows that when a harmonic is mistuned by 3-8% it pops out of the complex but still contributes to its pitch. Similarly, a harmonic turned on say 40 ms before the rest of a complex may pop out, but still contribute to the pitch. Even a harmonic played to the opposite ear contributes more or less fully to the pitch, but it's easy to hear it out a a separate tone. The point is that grouping obeys different rules depending on the task in hand; it is not "all or none".

For a review of this issue, see (plug, plug)

C.J. Darwin and R.P. Carlyon (1995). "Auditory Grouping". In Handbook of Perception and Cognition, Volume 6: Hearing, edited by B.C.J. Moore. Academic, Orlando, Florida, pp 387-424.