Figure 7.

Patterns of activity across IC neurons are largely distinct between single sources and two concurrent, separated sources. A, Human perception of two sources as a function of separation between a fixed source and a variable source. Triangles indicate location of the fixed source, with color-matched response curves below. Data from Best et al., 2004. B, Experimental simulation for rabbits. Two sources are presented concurrently in virtual acoustic space in every possible two-source configuration in the frontal hemifield. C, Performance of the population-pattern decoder on distinguishing two concurrent, separated sources from single sources, using all neurons (N = 59). Triangles indicate location of the fixed source, same as in A. D, Performance of the two-channel decoder, same as in C.