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Experimental Body Panel Contribution Analysis for Road Induced Interior Noise of a Passenger Car
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English
Abstract
This paper describes more in detail the methodology, the measurements and the results of the ASQ method. The Airborne Sound Quantification method aims at identifying the acoustical contribution of the different body panels surrounding a cavity. The contribution of different body panels is the product of the acoustical strength (or volume velocity) of each panel with the corresponding acoustic transfer function between the panel and the interior microphone position. These volume velocities are the product of the corresponding normal velocity and the surface. The normal velocity has been measured by means of accelerometers attached to the different subpanels. In the next step, the acoustical FRF's are measured in an indirect way using the reciprocity principle. This means that the pressure response at all the subpanels is measured when the acoustical excitation takes place at the target interior noise microphone position. A high quality low frequency sound source has been used. Finally, this synthesized interior noise has been compared with the directly measured interior noise. The correlation between both proved to be very good and the most dominant body panels have been successfully identified.
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Citation
Hendricx, W., Choi, Y., Ha, S., and Lee, H., "Experimental Body Panel Contribution Analysis for Road Induced Interior Noise of a Passenger Car," SAE Technical Paper 971913, 1997, https://doi.org/10.4271/971913.Also In
References
- van der Linden P.J.G. Fun J.K. “Using Mechanical-Acoustical Reciprocity for Diagnosis of Structure Borne Sound in Vehicles” '93 SAE Conference Traverse City, USA
- Wyckaert K. Van der Auweraer H. Hendricx W. “Correlation of acoustical modal analysis with operating data for road noise problems” Internoise 94 Yokohama
- Wyckaert K. Augustinovicz F. “Vibro-acoustical Modal Analysis: reciprocity, modal symmetry and model validity” Journal of Acoustical Society of America 1996
- Product Information Sheet: LMS Low Frequency Volume Velocity Sources E-LFWS