[Specific features of lateralization of a stationary auditory image by a human under condition of stimulation without...

Analysis of the lateralization phenomena of a fused auditory image (FAI) was performed on the basis of the previously developed model of the binaural directional hearing. It was found earlier that, under conditions of auditory stimulation without interaural differences, the FAI was localized at the head midline only in about a quarter of subjects. In a greater part of the listeners, the FAI was lateralized within the range of -4.6 ... +11.2 degrees from the midline. It was shown that FAI localization with reference to the head midline may be determined by the extent of asymmetry and spatial contrast between the "active" neural zones in the left and right halves of the subjective auditory space. In turn, the asymmetry (or its absence) of these "active" zones fully depends on a distribution of neurons by characteristic time delays in the left and right halves of the subjective auditory field. The model also explains the fact of a decrease in localization precision with the FAI position just at the midline.