Fig. 9.

Sensitivity to target azimuth under altered binaural cue conditions. For single sources, the ratio of the ITD-only directional SNR to the standard directional SNR (A) and the ratio of the fixed-ITD directional SNR to the standard directional SNR (B) is plotted vs. BF for all neurons for which frequency tuning data were collected. A ratio of 1 indicates the altered cue condition did not change the neural sensitivity to target azimuth. C and D: same directional SNR ratios as in A and B, respectively, calculated instead from target tuning functions in the presence of a central interferer. Filled circles indicate envelope ITD sensitivity, open circles indicate weak or no envelope ITD sensitivity, and crosses indicate ITD tuning data were not collected.