端部に有限インピーダンスを有する枝管型消音器の音響特性について(機械力学,計測,自動制御)

抄録

A side branch silencer which is one of reactive type silencer is effective for the reduction of the sound with periodicity. It is often used to reduce the noise due to the pulsation pressure etc. This is especially effective for the noise with single frequency. However, an effective frequency range is comparatively narrow. Moreover, the silencer is obliged to be large for countermeasure of the low frequency sound. And, that might cause the problem of the installation space. Then, in order to develop the side branch silencer which is effective for the low frequency range, the side branch with the finite impedance at the end of it was made and examined. As a result, it was clarified that this side branch was useful for the low frequency noise