Description:
<jats:p>The position-variable model [R. M. Stern, Jr. and H. S. Colburn, J. Acoust. Soc. Am. 64, 127–140 (1978); G. D. Shear and R. M. Stern, J. Acoust. Soc. Am. Suppl. 1 81, S27 (1987)] is extended to describe the subjective lateral position of amplitude-modulated tones and bandpass noise, as well as other complex stimuli that are presented within spectral regions at which the binaural system appears to be unable to make use of cycle-by-cycle interaural temporal differences. Predictions of the model are based on the centroid of the cross correlation of the hypothetical auditory-nerve response to the stimuli, which is either calculated using analytical techniques or simulated numerically. The model of auditory-nerve activity, which is typically used to describe the response to stimuli at lower frequencies, also extracts envelopes of higher frequency stimuli, as discussed previously by Colburn and Esquissaud. This information appears to be useful in predicting the lateral position of such high-frequency stimuli. Preliminary results indicate that the model is able to describe most of the ways in which the laterality of high-frequency binaural stimuli with low-frequency envelopes depends on modulation frequency, carrier frequency, and other stimulus parameters. The model also predicts the relative salience of interaural temporal cues at different frequencies. [Work supported by NSF.]</jats:p>