幾何音響シミュレーションのための弦楽四重奏用指向性音源モデル

概要

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The purpose of this research is to make clear the effect of fundamental characteristics of sound source on the acoustical properties of concert auditoria and present an acoustical design method considering the directional characteristics of sound sources. In this paper, string quartet is dealt as a case study. Acoustical quantities are calculated in variable auditorium models by means of geometrical simulation when the directional characteristics of string quartet are modeled on the measured directivity of violin, viola and cello. The relation between the directionality and the evaluation of sound field is examined. The result shows that it is difficult to grasp the sound field for each source only by using an omni-directional source, and a directional sound source model for string quartet used in geometrical acoustic simulation is proposed. The differences between the acoustical quantities calculated with the proposed source and with an omni-directional source are examined in real auditorium models. From the result, it is confirmed that the new directional model of sound source is valid in the prediction of sound field for string quartet. Careful consideration on directional characteristics of musical instruments like strings is necessary for good acoustics in concert halls.
社団法人日本建築学会の論文
2004-03-30