Figure 6.

Population-pattern decoding is consistent with the “duplex theory” of sound localization. A–C, Azimuth tuning functions of 3 IC neurons under standard (solid line), ITD-only (dashed line), and fixed-ITD (dotted line) cue conditions. BF of each neuron indicated in upper left corner. D, G, Localization performance of the population-pattern decoder using low-BF (N = 11) or high-BF (N = 32) neurons, respectively. E, H, Performance of the decoder when trained on data in the standard condition and tested on data in the ITD-only condition, using the same neurons as in D and G, respectively. F, I, Same as in E and H except decoder is tested on data in the fixed-ITD condition. Unity lines shown in D–I (gray lines).