Computer-aided Prediction of Airborne Sound Transmission through the Front Car End
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A robust model to assist the design process of passive acoustic treatments within a modern passenger car requires a realistic representation of the excitation sources as well as of all important transmission paths. To this end, the BMW Group and the Otto-von-Guericke University of Magdeburg work on the combination of numerical and experimental approaches to satisfactorily predict the sound transmission in complex systems.
1 Designing Premium Comfort Vehicles
Acoustics represents a differentiation feature among cars, especially in the premium segment, and underlines the quality impression of the product. Current trends in the automobile industry to lower fuel consumption have a large impact on the acoustic behavior of the vehicle. Such measures can be, for example, lightweight design and engine downsizing, which negatively affect acoustic performance. Lightweight design reduces the insulation of the car body, and engine downsizing produces a higher excitation level. Furthermore,...
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