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Measurement of the Statistical Variation of Structural-Acoustic Characteristics of Automotive Vehicles
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English
Abstract
Two structure-borne and two airborne paths were measured on 99 “identical” Isuzu RODEOs and 57 “identical” Isuzu pickup trucks. Significant effort was made to control measurement variability but not environmental (climate) variations. A record was kept of the tests of a reference vehicle over the variation of environmental factors. The frequency response functions (FRFs) of the reference vehicle varied by approximately 2-4 dB over the frequency range 0-500 Hz for the structure-borne paths and over 0-1000 Hz for the airborne paths due to measurement and environmental variations. The FRFs of the fleet varied by as much as 5-10 dB over the same frequency range. In this paper, the vehicle tests are described. The reference and the fleet data are shown in raw form. Reduced data and implications of the results are also discussed.
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Authors
Citation
Kompella, M. and Bernhard, R., "Measurement of the Statistical Variation of Structural-Acoustic Characteristics of Automotive Vehicles," SAE Technical Paper 931272, 1993, https://doi.org/10.4271/931272.Also In
References
- Wood L. A. Joachim C. A. ‘Scatter of structure-borne noise in four-cylinder motor vehicles’ SAE Annual Exposition and Congress Detroit Feb. 1986
- Wood L. A. Joachim C. A. ‘Interior noise scatter in four-cylinder sedans and wagons’ Int. J. of Vehicle Design 8 4/5/6 428 438 1987
- Bendat J.S. Piersol A.G. Engineering Applications of Correlation and Spectral Analysis John Wiley & Sons New York, NY 1980