An Experimental Investigation of Automobile Interior Wind Noise Using a Production Vehicle

Abstract:

Based on the analysis of automobile aerodynamic noise generation mechanisms and the components of interior wind noise, the spectra characteristics and spatial distribution rule of sound level of interior wind noise were investigated at first, then the frequency characteristics and noise level under different wind speeds, different yaw angles in SAWTC full-scale aeroacoustic wind tunnel were studied. The results show that: the interior noise level was nearly symmetric on vehicle left and right side, noise level of outboard ear was normally higher than that of inboard ear. The frequency characteristics under different wind speeds were almost the same, the linear OASPL of interior noise increased at about 4.4th power and A-weighted OASPL at about 5.5th power of wind speed. In addition, the acoustic power increased as yaw angle rose up, and noise level by leeward side was normally higher than that by windward under the same yaw angle.

• Periodical: Applied Mechanics and Materials (Volumes 105-107)
• Pages: 1860-1866
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.105-107.1860
• Online since: September 2011
• Authors: Yin Zhi He, Zhi Gang Yang, Yi Gang Wang
• Keywords: Interior Wind Noise, Spatial Distribution, Wind Speed, Wind Tunnel Test, Yaw Angle

References

[1] R. Buchheim, W. Dobrzynski, H. Mankau and D. Schwabe: Vehicle Interior Noise Related to External Aerodynamics. Int. J. of Vehicle Design, Vol. 3 (1982) No.4, p.398.

[2] M. Helfer: Aeroacoustic Testing in Wind Tunnels. 3rd MIRA International Vehicle Aerodynamics Conference (Rugby, U.K., October 18-19, 2000).

[3] E. Mercker: Kfz-Windkanäle fuer akustische Untersuchungen. Proceedings of the Symposium"Akustik und Aerodynamik des Kraftfahrzeugs", Haus der Technik, Essen, Germany (1994). （In German）

[4] W.B. Coney, J.Y. Her, K. Tomaszewicz, K.Y. Zhang and J.A. Moore: Experimental Evaluation of Wind Noise Sources: A Case Study. SAE, 1999-01-1812 (1999).

DOI: 10.4271/1999-01-1812

[5] A.R. George: Automobile Aerodynamic Noise. SAE, 900315 (1990).

[6] S.R. Ahmed: A Survey of Automobile Aeroacoustic Activities in Germany. SAE, 950623 (1995).

[7] Y. He, Z. Yang, Y. Wang, G. Ma and Z. Shen: An Experimental Study of Automobile Interior Aerodynamic Noise. 2011 International Conference on Electric Information and Control Engineering (Wuhan, China, Apr. 15-17, 2011). Vol. 5, p.3946. (In Chinese)

DOI: 10.1109/iceice.2011.5777112

[8] J. Ocker and Dr.-Ing. h.c.F.Porsche AG: Experimentelle Ermittlung der aerodynamisch induzierten spektralen Druckverteilung auf einer Fahrzeugoberfläche am Beispiel des Porsche Cayenne. ATZ/MTZ-Konferenz, Akustik -zukünftiger Fahrzeug- und Antriebskonzepte (Stuttgart, Germany, Mai 17~18, 2006). （In German）