The subject of this paper is the decrease of vehicle interior noise on behalf of the optimization of the shell geometry of panel structures. For that, the noise transfer function given in [2, 3] was to be minimized in a way that especially the sound pressure level in high level frequency domains is decreased whereas the sound pressure level in low level domains may remain constantly or may be slightly increased. In former articles, the panel investigated was a non-realistic model of a sedan roof. Herein, we consider the detailed model of a symmetry half of a vehicle dashboard coupled with a superelement that represents the modal behaviour of the remaining vehicle structure and coupled with the solution of the acoustic boundary value problem for the cabin that is provided by acoustic influence coefficients.
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