关键词: 声腔单元；声固耦合；蒙皮材料；降噪效果

Abstract: There is a large amount of air in the car, which can be divided into air volume units of different sizes. With the development of science and technology, noise reduction of different degrees of each cavity unit will be realized in the future. Therefore, this paper studies the noise reduction of local space in the car, imports the co-driver seat model into the finite element software HyperMesh, divides local cavity around the seat, and establishes a sound-structure coupling model.When different excitation conditions are applied to the acoustic cavity unit, the sound pressure response of two kinds of artificial leather materials, polyurethane (PUR) and polyvinyl chloride (PVC), are analyzed and compared, which provided a certain reference for noise reduction in the car.

Key words: Acoustic cavity unit; Sound-structure coupling; Skin material; Noise reduction effect