Abstract
A study of how the binaural system handles wave forms which are dissimilar at the two ears should yield information about the invariants of this system. We systematically varied the interaural correlation of a noncontextual wave form and noted the resulting changes in the interaural time disparity threshold. To get differing degrees of correlation we used an adaptation of Licklider's technique: narrow band noise common to both ears was mixed with similar noise of the same band width having independent wave forms at each ear. Varying the noise to noise ratio (common noise to independent noise) afforded a range of correlation values. The interaural time disparity threshold was used as our measure of binaural interaction because it reflects small changes of the stimulus, e.g., in frequency and duration. Indications are that the time disparity threshold is a positively accelerated function of the interaural correlation, where correlation is construed as the amount of variance common to both ears relative to the total variance. Some other interpretations of these data will be discussed.
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