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Wind Noise Transmission Loss for Separated Flow Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 5, 2019 by SAE International in United States
Annotation ability available
The transmission of turbulent flow pressures through panels to the interior noise depends on the spatial matching of the pressure and vibration fields. Since the exterior pressure field on a moving vehicle includes both turbulent pressure and acoustic pressure, both need to be factored into a noise transmission loss calculation. However, these two exterior pressure fields have very different spatial patterns. This is further complicated when the exterior flow is separated from the surface due to an obstruction. This study uses wind tunnel and road tests to measure and model the wind noise transmission loss through the side glass of a vehicle. The results are seen to be very different from the traditional sound transmission loss curves for an acoustic pressure source.
CitationDeJong, R. and Sorenson, S., "Wind Noise Transmission Loss for Separated Flow Conditions," SAE Technical Paper 2019-01-1469, 2019, https://doi.org/10.4271/2019-01-1469.
- Beranek, L. , Noise and Vibration Control (New York: McGraw-Hill, 1971).
- Lyon, R. and DeJong, R. , Theory and Application of Statistical Energy Analysis 2nd Edition (Boston: Butterworth-Heinemann, 1995).
- Blake, W. , Mechanics of Flow Induced Sound (Orlando: Academic Press, Inc, 1986).
- Hardin, J. and Pope, D.S. , “An Acoustic/Viscous Splitting Technique for Computational Aeroacoustics,” Theoretical and Computational Fluid Dynamics 6:323-340, 1994.
- Schell, A. and Cotoni, V. , “Flow Induced Interior Noise Prediction of a Passenger Car,” SAE Int. J. Passeng. Cars - Mech. Syst. 9(3), 2016, doi:10.4271/2016-01-1809.
- Cremer, L., Heckl, M., and Ungar, E. , Structure-Borne Sound (Berlin: Springer-Verlag, 1988).
- DeJong, R. and Ebbitt, G. , “Using the Modal Response of Window Vibrations to Validate SEA Wind Noise Models,” SAE Technical Paper 2017-01-1807, 2017, doi:10.4271/2017-01-1807.
- Rovedatti, V., Milhorn, J., DeJong, R., and Ebbitt, G. , “Vehicle Wind Noise Measurements in a Wind Tunnel with a Contoured Top Profile,” SAE Int. J. Passeng. Cars - Mech. Syst. 9(1):234-237, 2016, doi:10.4271/2016-01-1316.
- Zylstra, N. and DeJong, R. , “The Design of Wind Noise Transducers to Separate Acoustic and Turbulent Pressures,” SAE Technical Paper 2017-01-1899, 2017, doi:10.4271/2017-01-1899.
- Farabee, T. and Casarella, M. , “Spectral Features of Wall Pressure Fluctuations Beneath Turbulent Boundary Layers,” Physics of Fluids A: Fluid Dynamics 3:2410, 1991, doi:10.1063/1.858179.
- Bonness, W., Capone, D., and Hambric, S. , “Low-Wavenumber Turbulent Boundary Layer Wall-Pressure Measurements from Vibration Data on a Cylinder in Pipe Flow,” J. Sound Vib. 329:4166-4180, 2010.
- ASTM E2249-02(2016) , “Standard Test Method for Laboratory Measurement of Airborne Transmission Loss of Building Partitions and Elements Using Sound Intensity,” ASTM International, West Conshohocken, PA, 2016, doi:10.1520/E2249-02R16.
- von Werne, D., Orlando, S., Van Gils, A., Olbrechts, T. et al. , “Target Setting and Prediction for Cabin Noise and Vibration in Aircraft Development,” SAE Technical Paper 2017-01-1766, 2017, doi:10.4271/2017-01-1766.
- Dande, H., Wang, T., Maxon, J., and Bouriez, J. , “SEA Model Development for Cabin Noise Prediction of a Large Commercial Business Jet,” SAE Technical Paper 2017-01-1764, 2017, doi:10.4271/2017-01-1764.