波面合成法による立体音場再生におけるマイクロホン及びスピーカの指向特性による波面の合成精度への影響

概要

論文の詳細を見る
Sound field reproduction based on wave field synthesis is a technique that synthesizes wave fronts in a listening area using multiple microphones and loudspeakers placed at the boundary of the area. This study evaluates the effects of the directivity of microphones and loudspeakers on the accuracy of synthesized wave fronts. Microphones in an original field and loudspeakers in a reproduction field were placed at the boundary of both areas which have two cases (a circle with a radius of 2 m and a square 4 m on a side). Three directional patterns (omnidirectional, unidirectional, and shotgun) were designed as directivity conditions of microphones and loudspeakers. The results of computer simulation show that there is almost no effect due to directivity of loudspeakers and that unidirectional or shotgun microphones can reproduce accurate wave fronts.
2007-06-30