Fig. 5.
Neural sensitivity to ITD. Average firing rate as a function of ITD for the 3 broadband noise stimulus conditions: unmodulated noise with correlated fine structure (unmod_corr, blue lines), modulated noise with correlated fine structure (mod_corr, black lines), and modulated noise with uncorrelated fine structure (mod_uncorr, red lines). The unit characteristic frequencies (CFs, in kHz) are 3.79 (A), 3.0 (B), 2.39 (C), 3.66 (D), 1.7 (E), and 6.88 (F). The fm of the SAM noise was 100 Hz except for the data in F, which were obtained with a SAM frequency of 40 Hz. Unit quality is illustrated by superimposed waveforms of >500 spikes recorded in response to the mod_corr stimulus for the units shown in C–E. Scale bar in C is 1 ms; all spike waveforms are plotted on the same timescale.