Vol. 8, No. 1 (December, 2008)

Theory of auditory temporal and spatial primary sensations
Yoichi Ando

Getting results of a number of previous papers into together, this paper proposes a theory of auditory temporal and spatial primary sensations. The model consists of the autocorrelation function (ACF) mechanism and the interaural crosscorrelation function (IACF) mechanism for signals arriving at two ear entrances, and the specialization of human cerebral hemispheres. Evidences of this auditory model have been found by recording the auditory brainstem response (ABR), the slow vertex response (SVR), the electroencephalogram (EEG) and the magnetroencephalogram (MEG). It may describe four temporal primary sensations including pitch or missing fundamental, loudness, timbre, and in addition duration sensation. These four temporal sensations may be formulated by the temporal factor, which may be extracted from the ACF associated with left hemisphere. Three spatial sensations consisting of localization in the horizontal plane, apparent source width (ASW) and subjective diffuseness are described by the spatial factor extracted from the IACF associated with the right hemisphere.

Key words: temporal primary sensations and spatial primary sensations, temporal and spatial factors extracted from ACF and IACF, specialization of left and right cerebral hemispheres

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