2チャンネル音響信号の相互相関関数とヘッドホン受聴時における音像の空間的印象

抄録

The relationship between the cross-correlation function of two-channel acoustic signals reproduced through the headphones and spatial impressions of sound image is investigated. White or band-limited noises with the various cross-correlation function are employed for acoustic signals. Subjects are asked to make similarity judgments and some subjective evaluations of pairs of the noises. The experimental data are analyzed by Kruskal's multidimensional scaling(MDS)programs. The analysis of the experimental data shows the followings:(1)spatial impressions of sound image depend mostly on the width, the elevation and the lateral displacement of the sound image, (2)the width of the sound image increases as the maximum absolute value of the cross-correlation function decreases and the peak position of it goes away from τ=0, (3)the elevation of the sound image tends to increase as the maximum value of the cross-correlation function increases as long as the maximum value is positive, (4)the lateral displacement depends on the asymmetry of the shape of the cross-correlation function and mostly on the positive peak position of it