Abstract
Based on physiological responses, a model of the auditory-brain system may be proposed. The model consists of the autocorrelation mechanisms, the interaural cross-correlation mechanism between the two auditory pathways, and the specialization of human cerebral hemispheres for temporal and spatial factors of sound field. The specialization of the human cerebral hemisphere may relate to the highly independent contribution between the spatial and temporal criteria of sound fields on subjective preference judgments. In addition, based on the model, any other subjective attributes of sound fields can be described in terms of processes of the auditory pathways and the brain. For example, the phenomena of missing fundamental, loudness and coloration, the threshold of perception, and preferred delay of a single reflection are well described by the autocorrelation mechanism. The subjective diffuseness and ASW are described by the interaural crosscorrelation function. Even so-called ‘‘cocktail party effects’’ may well be explained by such specialization of the human brain, because speech is processed in the left hemisphere, and the directional spatial information is mainly processed in the right hemisphere. [Work was partially supported by the Ministry of Education, Grant-in-Aid for Scientific Research (C), 9838022, 1997.]
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