Vehicle-road interaction for interior noise measurement and evaluation
by Mohamed I. Khalil; Mohamed N. Mansy; Ahmed A. Saad; Shawki A. Abouel-seoud
International Journal of Vehicle Noise and Vibration (IJVNV), Vol. 8, No. 4, 2012

Abstract: Nowadays, one of the most valuable criteria of vehicle quality assessment is based on acoustic emission levels. A vehicle is judged comfortable depending on the noise levels transmitted inside. Consequently, there is a general attention to the design criteria aimed at improving the structural acoustic behaviour, to comply with the increasingly restrictive ergonomic standard. Therefore, it is necessary to investigate the effects of different road surfaces on vehicle interior noise and to investigate a method of predicting road noise from multiple surfaces based on vehicle noise measurement of a single surface. To achieve this objective, the present work evaluates the noise at the vehicle driver's head position. The results demonstrate that differences in the input energy distribution are the primary causes for different subjective impressions of road interior noise over various surfaces, with the exception of very smooth surfaces where tyre tread noise dominates. This obsevation led to the proposition that road surface transfer function (RSFT) could be used to predict road interior noise due to various road surfaces based on a measurement over a single road surface.

Online publication date: Fri, 29-Aug-2014

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