並列接続線路で模擬される管路要素の音響特性解析

抄録

This paper describes analysis of acoustic characteristics of an expansion type silencer with inserted tube based on the equivalent circuit. The purpose of this study is to clarify the acoustic noise suppression mechanism of the combining an expansion type silencer and inserted tube. It is possible to model the acoustic characteristics of the expansion type silencer by parallel network system. We investigate the transmission loss and the insertion loss of the silencer numerically and experimentally. The results show that the calculated results based on the equivalent circuit and the experimental results have the same tendency. The results also show that the position of the hole in the inserted tube is important factor for transmission loss of the silencer.