非対称ホール空間の音場特性に関する研究 : その2 音響模型実験による考察

概要

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The purpose of this study is to investigate the relation between acoustic characteristics of sound field and the fundamental room shape of auditoria from the point of view of geometric features of the space, namely, symmetric or asymmetric, and to make clear the acoustical validity of asymmetric room shape in acoustic design. In this paper, the spatial distributions of reflection levels are investigated in the seating areas of hall models, whose shapes are systematically varied in plan, by means of scale model techniques. The results show that there is a significant difference in the attenuation of reflected energy due to the source-receiver distance between symmetric and asymmetric shapes, and particularly, the effect of asymmetric shape on an increase in late-arriving sound level is found at the rear seats. The present results definitively confirmed our previous findings in geometrical acoustic simulation. Finally, more options and possibilities in acoustic design methods can be realized by considering the contributions of asymmetric configuration to the uniformity of sound fields.
2006-02-18