Author(s)

S. Marburg

Abstract

Acoustic diagnostics in vehicle cabin noise are becoming more and more of a special interest for the automotive industry. Mechanical transfer functions can be calculated rather exactly. The resulting velocity field of the vibrating panels cannot be considered as supplying complete information about real contributions to the sound pressure level for frequencies higher than 80 Hz. Another method is the determination and visualiza- tion of influence factors used as weighting factors for the velocity field to calculate true contributions. Two different Boundary Element based methods for the calculation of influence factors and participation factors are shown in this paper. Mode superposition techniques can be applied optionally. Furthermor

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