Abstract
This is an extension of a study of the effect of the crosscorrelation for a masking noise upon the detection of a tonal signal reported in 1963 by Langford and Jeffress. In the previous study, a wide-band noise was used, while in the present study a narrow-band noise approximating the critical band at the signal frequency was employed as the masker. The crosscorrelation of the masker was varied by introducing a time delay into the channel to one ear. The signal was presented in-phase at the ears and reversed-in-phase at one ear. Data are presented as masking-level differences (MLD's) relative to the undelayed homophasic condition. The function relating MLD's to values of correlation is cyclic and becomes damped as the noise delay is increased. The MLD's for antiphasic conditions are larger, however, than those obtained for wideband noise. The results are discussed in terms of a model for binaural hearing.
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