穴あき板で仕切られた１次元音場の共鳴周波数に及ぼす穴あき板の影響

抄録

Natural acoustic frequency of one dimensional duct partitioned by a perforated plate was clarified to come down with decreasing an aperture ratio experimentally and analytically. In order to clarify the reason, the sound propagation experiment was conducted. As a result, it was clarified that the smaller the aperture ratio was the longer the sound arrival time became. This is equivalent to the getting long of the duct and the natural acoustic frequency can be considered to become low.