Effect of Varying the Interaural Noise Correlation on the Detectability of Tonal Signals

Abstract

The effects of varying the interaural correlation for noise on the detectability of a 500-cps tonal signal were studied. The noise correlation was reduced by adding uncorrelated noise in the noise channels to the ears. Comparisons were 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 50% thresholds, obtained with the constant method, and on the detectability index, d'', obtained in a two-interval, forced-choice situation.