Effect of set position of perforated plate on acoustic natural frequency of one dimensional sound field

Abstract

This paper deals with the effect of the set position of a perforated plate on the acoustic natural frequency of an one dimensional sound field partitioned by the perforated plate. The acoustic experiments using the one dimensional duct partitioned by the perforated plate and the numerical analysis by the transfer matrix method were conducted. As a result, it was clarified that the effect of the set position of the perforated plate on the acoustic natural frequency is small when it is set at the node of the particle velocity mode. On the other hand, it becomes large when the perforated plate is set at the belly of the mode.