An auditory illusion predicted from a weighted cross-correlation model of binaural interaction

Journal/Book: Psychol Rev. 1996; 103: 750 First St NE, Washington, DC 20002-4242. Amer Psychological Assoc. 137-142.

Abstract: In humans, the lateral movement of an acoustic source produces dynamic changes in the relative sound-pressure level and time of arrival of the acoustic wave at the 2 ears. The dynamic nature of these cues is assumed to play an important role in the perception of lateral motion. A phenomenon of auditory motion is reported whose lateral direction and relative velocity may be specified while interaural differences are kept constant. The stimulus producing this percept is a narrowband waveform whose instantaneous bandwidth is a cosine function of time. This phenomenon is predicted from a model of cross-correlation that estimates the running position of an image from a weighted combination of 2 variables: (a) magnitude of interaural delay, with smaller delays receiving more weight, and (b) consistency of interaural information across frequency.

Note: Article K Saberi, Mit, Electr Res Lab, 36-767, Cambridge, MA 02139 USA

Keyword(s): APPARENT MOTION; MOVEMENT ANGLE; LATERALIZATION; SEPARATION; FREQUENCY

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