Interaural time differences (ITDs) are the main cues used by humans to determine the horizontal position of low-frequency (<1500 Hz) sound sources. The neural representation of ITDs is presumed to be one in which brain centres in each hemisphere encode the opposite (contralateral) side of space (Jenkins and Merzenich 1984). Assumptions in most human psychophysical studies are that the range of ITDs encoded is constant across the range of sound frequencies at which sensitivity to ITDs in the fine-structure of sounds is observed (<1500 Hz) (Trahiotis and Stern 1989) and determined largely by the physiological range, but with greater ITDs of probably up to at least 3000 μs, explicitly encoded in the 500-Hz frequency band in order to account for human psychophysical performance (van der Heidjen and Trahiotis 1999).
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Mcalpine, D., Thompson, S., Von Kriegstein, K., Marquardt, T., Griffiths, T., Deane-Pratt, A. (2007). A π-Limit for Coding ITDs: Neural Responses and the Binaural Display. In: Kollmeier, B., et al. Hearing – From Sensory Processing to Perception. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73009-5_43
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