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A Test Methodology for Vehicle Wind Noise Reduction and Acoustic Quality Improvement
Technical Paper
2019-26-0216
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Aeroacoustics of vehicles is becoming an important design criterion as it directly affects passenger’s comfort. The wind noise at highway speeds (>80 KMPH) is a critical quality concern under normal and crosswind conditions and dominant factor in assessing acoustic comfort of the vehicle. Wind noise is caused by the vortex air flow around a vehicle body and air leakage through the sealing gaps of attached parts. This majorly contributes to high frequency noise (>250 Hz). Accurate identification and control of noise sources and leakage paths result in improved acoustic comfort of the vehicle.
In this paper, aero-acoustic quality characteristics of validation prototype vehicle are studied. The major wind noise sources and leakage paths in the vehicle are identified through in-house blower set up in the semi anechoic room. The overall wind noise level and articulation index of vehicle at various speeds are determined through on- road measurements.
The improvement in the vehicle articulation index (AI) by 14% and reduction in noise level by 4 dB (A) are achieved through design modification of seals, door structure and trim parts.
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Authors
Citation
Mukkera, S., Raamya Premkumar, S., Samar, D., and R, P., "A Test Methodology for Vehicle Wind Noise Reduction and Acoustic Quality Improvement," SAE Technical Paper 2019-26-0216, 2019, https://doi.org/10.4271/2019-26-0216.Data Sets - Support Documents
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References
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- Murad , N.M. , Naser , J. , Alam , F. , and Watkins , S. Simulation of Vehicle A-Pillar Aerodynamics of Various Yaw Angles 15th Australasian Fluid Mechanics Conference Sydney, Australia Dec. 13-17 2004
- Shaobo , Y. Vehicle NVH Development Process and Technologies ICSV21 Beijing, China July 13-17 2014
- Helcio , O. , Hage , M.M. , and Edgar , B. Articulation Index (Al): Concepts and Applications SAE Technical Paper 2000-01-3150 2000 10.4271/2000-01-3150