This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Wind Noise Transmission Loss for Separated Flow Conditions
Technical Paper
2019-01-1469
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
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.
Recommended Content
Citation
DeJong, 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.Also In
References
- Beranek , L. Noise and Vibration Control New York McGraw-Hill 1971
- Lyon , R. and DeJong , R. Theory and Application of Statistical Energy Analysis 2nd 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 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 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 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 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 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 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 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 10.4271/2017-01-1764