Figure 2.

Evolution of the CorrCoef and MI mean values as a function of temporal precision in each structure. A, The trial-to-trial temporal reliability, quantified by the CorrCoef, was calculated from responses to original vocalizations with a width of Gaussian window varying from 1 to 50 ms in CN (in black), CNIC (in green), MGv (in orange), A1 (in blue), and VRB (in purple). In our study, a 10 ms width Gaussian window (dashed black line) was selected for the data analysis in each structure. B, Mutual information (in bits) was calculated from neuronal responses to original vocalizations with a bin size varying from 1 to 40 ms in CN (in black), CNIC (in green), MGv (in orange), A1 (in blue), and VRB (in purple). In this study, the value of 8 ms was selected for the data analysis because in each structure the MI value was maximal (dashed black line). This holds true also in the different conditions of acoustic alterations, both in noisy and vocoded conditions (data not shown).