境界壁面上の制御用音源を用いた窓を通過する騒音のアクティブコントロール

抄録

Active control of noise passing through an aperture has been studied. Previous studies have shown that a large sound reduction effect can be achieved by an active noise control system that uses controlled sound sources placed in the aperture. It has been shown that the sound reduction effect is less when the control source is placed on the aperture surface boundary than when the control source is placed inside the aperture surface. This paper proposes a method to suppress noise passing through an open window section by using multiple control sources placed on the frame of the open window. Numerical simulation results show that the sound reduction effect can be improved by driving the control sources to generate only plane wave components, even when the control sources are placed on the frame of the open window.