The Sound Field Characteristics in Automobile under Different Speaker Height based on Numerical Simulation

Abstract

The automotive acoustic environment has become an indispensable listening space in people’s daily lives. However, due to the complexity of the acoustic environment inside automobiles, the sound reproduction in automobile is particularly problematic compared with that in ordinary domestic environments. From the perspective of sound reproduction, it is an effective approach to improve the reproduction performance by raising the speaker height such that nearer to the height of listener’s ear. However, this issue has been less studied quantitatively. In current work, we aim to explore how the speaker height affects the sound field characteristics at target listening region by using the finite element method. The speakers at front door inner panels were mounted to three different heights, respectively, and the sound field characteristics at target listening region in driver seat were analysed. Result showed that for higher speaker layout resulted in larger sound pressure levels at the target listening point, and the sound field distribution tends to be more homogeneous. Also, raising the speaker height is conducive to giving a constant frequency response at the target listening point. This works can provide the reference for the design of automotive audio system.