Abstract

The detectability of a monaurally presented, 500-cps signal was measured at each of several values of interaural correlation for a wide-band noise masker. The results, when expressed in terms of masking-level differences (MLD's), are in agreement with data reported by Wilbanks and show a function of similar form to that described by Robinson and Jeffress. The data are used to estimate parameters for a simple model which attempts to account for changes in detectability that occurs when a monaural signal is presented with binaural, correlated noise having an interaural level difference. The model suggests that, at low external noise levels, internal noise leads to a decrease in interaural-noise correlation. Predictions from the modal are in reasonable agreement with data reported previously by Egan and Dolan, et al. [Research partially supported by United Cerebral Palsy Research and Training Foundation and by Air Force Office of Scientific Research.]

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