Detection of interaural time difference
The interaural time difference (ITD) is detected using the cross-correlation calculation. The correlation is calculated between the left and right channels for a range of time offsets (τ) of ±1ms (large enough to take into incorporate the full range of naturally occuring ITD values). The value of τ that relates to the peak in the measured cross-correlation is a prediction of the interaural time difference of the signal. An example measurement result is shown below.
These data are then passed on to be combined with the measured interaural level difference data.