Figure 7. Effect of heterogeneity and lesions.
(A) Mean error for the hemispheric (red) and pattern match (green) decoders in the guinea pig model, depending on the spread of the best delays, for white noise presented with acoustic noise (SNR between −5 and 5 dB, no HRTF filtering). For every frequency, the standard deviation of BDs is multiplied by the spread factor: lower than 1 denotes less heterogeneous than the original distribution (top left), greater than 1 denotes more heterogeneous (top right). Dashed lines represent the estimation error for the original distribution. (B) Mean error for the pattern match (green) and smooth peak (blue) decoders before (dashed) and after (solid) lesioning one hemisphere in the guinea pig, as a function of presented ITD. The model is retrained after lesioning. The error curves are Gaussian smoothed to reduce noise and improve readability.