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Re: [AUDITORY] Phase flip detection

This paper seems relevant:

Shailer, M. J., & Moore, B. C. (1987). Gap detection and the auditory filter: Phase effects using sinusoidal stimuli. The Journal of the Acoustical Society of America81(4), 1110-1117.


On Jan 14, 2023, at 10:15 PM, R. Zatorre, Dr. <robert.zatorre@xxxxxxxxx> wrote:

Dear colleagues

We are doing a study with a simple stimulus. It's a periodic complex tone which is interrupted briefly by a noise burst (noise starts and ends at a zero crossing, and there's a short ramp on either side). On half the trials the tone continues with the same phase as if no noise had occurred. In the other trials, the phase is flipped by 180 degrees. (See figure below)

Question: does anybody know of a previous experiment with a similar setup? Is the phase flip perceivable? Casual listening by a few of us in the lab suggests it is not, and we will do proper psychophysics to test this out. But we thought that perhaps to avoid re-inventing the wheel we should see if something like this has already been tried. There are dozens of papers out there on various aspects of phase perception, but most seem to deal with binaural hearing or manipulations of phase of the harmonics of a complex tone, neither of which are really relevant.

Thank you in advance for your collective wisdom.


without phase shift 



With phase shift:





Robert Zatorre, PhD

Professor and Canada Research Chair

Montreal Neurological Institute

McGill University
fax: 514-398-1338

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