残響音場の複雑さに対する一評定法

概要

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In this paper, the concept of entropy, which is analogous to those in thermodynamics and communication engineering, is introduced as a measure of complexity (variety) of a sound field. The complexity of a reverberant field is analyzed by use of this concept. Every entropy is defined in terms of the contribution of each component to the reverberant field which is formulated in well-known ways, such as direct wave and reflected waves (discrete or continuous process) ; real source and image sources ; and normal modes. The results show that raising the complexity leads us to excite each component equally as much as possible (law of equipartion of energy), and that each entropy always tends to increase with time through the life of the reverberant field (i. e. , buildup and decay processes).
社団法人日本音響学会の論文
1982-08-01