Sound field analysis on car cabin by the FDTD method -Application of extended reactive boundary

Abstract

We have applied the Finite-Difference Time-Domain method, the numerical simulation method, in order to analyze the sound field of a car interior. In a previous research, digital filter impedance model was applied based on the assumption of a locally reacting boundary. Here, we introduce a new method also considering wave propagation inside the seats. After examining the validity of the proposed method thorough 1-D sound field and a single seat model as well, measured and calculated impulse responses inside the car cabin were compared. The feature of the new method both in theoretical and in practical is cleared up through the study.