Discriminability of Interaural Time Difference
Roy G. Klumpp · The Journal of the Acoustical Society of America · 1953
Using earphone presentation and electrical lag lines which allow precise control of time delays, measurements were made of interaural time difference thresholds for pure tones and noise bands. The time difference threshold is here defined as the minimal change in interaural time difference which elicits a perceptible shift in the location of the sound image. Results present the discrimination threshold for interaural time delay as a function of the psychophysical method of measurement, band width and center frequency of the signal. Under optimum conditions, the mean interaural time difference threshold for the five best listeners is about six microseconds. Under similar conditions, the mean threshold for 23 listeners is about 12 microseconds.