Abstract: Sensitivity to differences in interauraF correlation was measured as a function of reference intermural correlation and frequency (250 to 15W Hz) for narrowband-noise stimuli (1.3 ERBs wide) and for the same stimuli spectrally fringed by broadband correlated noise. d' was measured for twe-interval discriminations betweerr fixed pairs of correlation values, and these measurements were used to generate cumulative d' versus correlation curves for each stimulus frequency and type. The perceptual cue reported by subjects was perceived intracranial breadth for narrowbarrd stimuli (wider image for lower correlation) and loudness of a whistling sound heard at the frequency of the decorrelated band for the fringed stimuli (louder for lower correlation). At low correlations, sensitivity was greater for fringed than for narrowband stimuli at all frequencies, but at higher correlations, sensitivity was often greater for narrowband stimuli. For fringed stimuli, cumulative sensitivity was greater at low frequencies than at high frequencies, but listeners produced varied patterns for narrowband stimuli. The forms of cumulative d' curves as a function of frequency were interpolated using an eight-parameter fitted function. Such functions may be used to predict listeners' perceptions of stimuli that vary across frequency in intermuralcorrelation
