立体録音における方向感の実験的検討

概要

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The advent of the multi-channel sound recording system has stimulated developements in the stereo-phonic reproduction of magnetically recorded signals, and has inspired much active discussion by research workers on the boundary conditions of stereo-phonic reporduction. But these discussions hitherto have chiefly dealt with the sound space of travelling wave fronts radiated from scattered sound sources, and have neglected the aspects of transformation between the physical properties and the auditory sensation. Based on these observations, we experimented with the transitional phenomena existing between the factors of time, phase and amplitude of the sound waves and the hearing sensation, and we have clarified their effect on the directional localization of sound sources with the aid of binaural and the stereo-phonic methods. It was recognized that the factors of the difference in the amplitude of the signals entering the two ears is the most important in directional localization of steady-state sound signals, and an amplitude difference of 0. 2db clearly produces a sensation of change in the direction of the source. Moreover, the transient response of our hearing organ is so sensitive that the time difference in the received signals also constitutes another very important factor.
社団法人日本音響学会の論文
1954-09-30