構造・音響連成系の実験解析と理論的考察

付加ばねマス系を有する弾性パネルと一端で連成する音響管の場合

抄録

In previous papers, to clarify the features of sound field of a structural acoustic-coupling system, a rectangular prism with one or two flexible panels is analyzed by the authors. From a practical point of view, a rectangular prism with flexible panels with some additional masses attached is also important. In this paper, a rectangular prism with a flexible panel attached with a spring-mass system is considered. First, experimental study is conducted. Two noteworthy features are found. One is that the mode that has non-vibrated flexible panel exists. The other is that the fixed state, whose existence is confirmed in the previous papers can be removed. Then, theoretical study is made using a one-dimensional mathematical model. It is found this model can explain the features mentioned above.