Adrian COROIAN, Iulian LUPEA


: During a vehicle development, the acoustic comfort represents an important field of research for the car makers and often a way to differentiate between brands. The acoustic comfort depends on the multilayer materials from inside the passenger compartment. The acoustical performance of a material is evaluated by means of the sound absorption coefficient and the sound transmission loss. In the first part of this study, three acoustic treatments from inside Logan model are presented. In the second part, the Finite Element Method (FEM) was used for a vibro-acoustic analysis of a simplified passenger compartment. In order to simulate the sound pressure level (SPL) at the hearing point of the driver while the firewall panel is excited, the modal frequency response analysis has been performed with Radioss solver (a module of HyperWorks software package). To study the effect of the sound absorbing material on acoustic comfort, the sound pressure level inside the simplified passenger cabin with and without the acoustic treatment was investigated and analyzed by using Computer Aided Engineering (CAE).

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