Data are presented on the effects of varying the interaural correlation for noise on the detectability of a 500-cps tonal signal. The noise correlation was reduced by adding uncorrelated noise in the noise channels to the ears. Comparisons are made between data obtained with this method of reducing the noise correlation and with previous data obtained by introducing a displacement in time in the noise to one ear. Masking-level differences are presented, based on fifty-percent thresholds, obtained with the constant method and on the detectability index d′ obtained in a two-interval, forced-choice situation.
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Robinson et al. (1963) studied this question.