Detecting the start of the impulse responses for IACC

In IACC calculation, there is supposed to be a spacing between the mikes on the order of an ear-to-ear distance (approx. 15cm). We have chosen to detect the start separately for the two measurements, as the time lag is not important for the result, only the maximum value of the interaural crosscorrelation function.

If the automatic detection of the start of the impulse responses should fail, the start point may be set manually, see the How to set manual start of the impulse response? section.

In this case there might be a problem not being able to specify two different starting points manually (both impulse responses may not start at the same point because they are spaced 15 cm from each other. And the manual starting point must be the same for both impulse responses). However, based on tests we have done during implementation this measure should not be much sensitive to start point deviations. Therefore, doing a manual start detection should work fine if you make sure to include the start of both impulse responses.