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Determination of Heavy Truck Noise Sources under Actual Highway Operating Conditions Using Acoustic Beamforming
Technical Paper
2017-01-1837
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Acoustic beamforming was used to localize noise sources on heavy trucks operating on highways in California and North Carolina at a total of 20 sites. Over 1,200 trucks were measured under a variety of operating conditions, including cruise on level highways, on upgrades, down degrades, low speed acceleration, and for various speeds and pavements. The contours produced by the beamforming measurements were used to identify specific source contributions under these conditions and for a variety of heavy trucks. Consistently, the highest noise levels were seen at the tire-pavement interface, with lesser additional noise radiated from the engine compartment. Noise from elevated exhaust stacks was only documented for less than 5% of the trucks measured. The results were further reduced to produce vertical profiles of noise levels versus height above the roadway. The profiles were normalized to the highest noise level at ground level. The profile averages from each measurement site were found to be independent of speed and operating conditions and were consistent from site-to-site. The highest levels were also related to the tire-pavement noise measured, independently, using on-board sound intensity methods. The results of this research are presented, and their implications for highway noise and noise modeling are discussed.
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Donavan, P. and Janello, C., "Determination of Heavy Truck Noise Sources under Actual Highway Operating Conditions Using Acoustic Beamforming," SAE Technical Paper 2017-01-1837, 2017, https://doi.org/10.4271/2017-01-1837.Data Sets - Support Documents
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References
- Gurovich , Y. , Plotkin , K. , Robinson , D. , Blake , W. , and Donavan , P. Acoustic Beamforming: Mapping Sources of Truck Noise NCHRP Report 635 Transportation Research Board Washington, D.C. 2009
- Donavan , P. and Rymer , B. Measurements of the Vertical Distribution of Truck Noise Sources during Highway Cruise Pass-bys Using Acoustic Beam-Forming Journal of the Transportation Research Board, No. 2123, Environment 2009 Transportation Research Board of National Academies Washington, D.C. 2009 145 152
- Donavan , P. , and Janello , C. Mapping Heavy Vehicle Noise Source Heights for Highway Noise Analysis NCHRP Report 842 Transportation Research Board Washington, D.C. 2009
- Standard Practice for Measurement of Tire/Pavement Noise Using the On-Board Sound Intensity (OBSI) Method, TP 76-12, American Association of State Highway and Transportation Officials, 444 North Capitol Street N.W., Suite 249 May 2012 Washington, D.C. 20001