Fig. 1.

Instantaneous interaural time difference (ITD) and interaural level difference (ILD) computed over a sliding 2-ms window. Broadband noise was bandpass filtered with a center frequency of 750 Hz for ITD and 6 kHz for ILD. ITD was computed as the delay associated with the peak of the normalized interaural correlation function. ILD was computed as the ratio of the Hilbert envelopes of the left and right filtered waveforms. A and B: ITD and ILD, respectively, for a single sound source at +90° azimuth. C and D: ITD and ILD, respectively, for 2 concurrent sources of equal intensity at 0° and 90°.