並列線路を有する等価回路による管路系消音器の音響特性解析

抄録

This paper describes the analysis of acoustic characteristics of duct-silencer in consideration of loop components in sound field. The purpose of this research was to clarify the validity of the calculation result of the silencer simulating the loop components in the hole. We measured the transmission loss of the expansion silencer based on the transfer function method. It was possible to model the acoustic characteristics of the expansion silencer using a parallel network system. We investigated the transmission loss of the expansion silencer with extended-tube. The calculated results based on the equivalent circuit and the experimental results showed the same tendency. We conclude that the calculated results of the characteristics of the silencer simulating the loop components in the hole based on the equivalent circuit are valid.