Recent data on interaural time discrimination of high‐frequency complex stimuli are described by a model based on auditory‐nerve activity. This model is a simple extension of a model that was developed for detection and discrimination of low‐frequency stimuli and that includes an explicit description of the activity in the auditory‐nerve fibers. In the extension to high frequencies it is assumed, consistent with available physiological data, that the high‐frequency neurons have instantaneous firing rates that follow the envelope of the tuning‐curve filtered signal. Beyond the auditory nerve description, the model assumes a structure for processing timing information on high‐frequency fibers that is the same as the structure for low frequencies. [Work supported by NIH.]