Neuroimaging for perceptual comparison of binaural and stereophonic sounds. From left to right: EGI^® sensor net, average ERPs (Event Related Potential) measured in the parieto-occipital region and the frontal region. Blue and purple curves correspond to deviant stimuli in the binaural and stereophonic condition respectively, while red and green curves correspond to standard stimuli in the binaural and stereophonic condition respectively (from [151]).