Sound Insulation Simulation using the Finite Element Method

(Optimization study based on the difference in heights of the vertical core)

Abstract

We have proposed a simulation method for obtaining sound insulation performance with good accuracy using finite element method for elongated acoustic tubes that can be considered as one-dimensional. This is due to the separation of the sound pressures in front of the sound insulation wall between incident waves and reflected waves by Helmholtz's equation. In this study, we consider whether the "two-point microphone method", which is mainly used during experimental measurement, can be used for finite element simulation. In addition, by this method, the effect at low frequency by the core height in the vertical core which is one of the core shapes advantageous for sound insulation is confirmed and optimized.