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Updated: Oct 9, 2025

The Power of Interstimulus Interval for the Assessment of Temporal Processing in Rodents
Published on: April 19, 2019
Interaural-time-difference thresholds for broad band-limited pulses are affected by relative bandwidth not temporal
Paul G Mayo1, Philip C Saunders1, Matthew J Goupell1
1Department of Hearing and Speech Sciences, University of Maryland, College Park, Maryland 20742, USA paulmayo@umd.edu, psaund99@umd.edu, goupell@umd.edu.
Abstract:
Humans are sensitive to interaural time differences (ITDs) conveyed by slow modulations on high-frequency carrier signals. Sensitivity appears to be affected by temporal envelope sharpness, but it is unclear if there is a limit to which sharpness affects sensitivity. Pulse trains were varied in relative bandwidth (re: critical bandwidths) and center frequency. ITD sensitivity increased with increasing bandwidth. There was no effect of center frequency when relative bandwidths were analyzed, suggesting that the temporal envelope sharpness (concomitantly absolute bandwidth in Hz) did not affect performance. Rather, sensitivity was most easily explained by recruitment of additional auditory channels.
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