Case Study of Pass-By Noise Development on a Class 8 Truck

Paper #:
  • 2011-01-1731

Published:
  • 2011-05-17
Citation:
Sorenson, S., Jorro, S., Knittel, J., and Waltenberry, C., "Case Study of Pass-By Noise Development on a Class 8 Truck," SAE Technical Paper 2011-01-1731, 2011, https://doi.org/10.4271/2011-01-1731.
Pages:
13
Abstract:
Governmental regulations regarding exterior noise emitted by motor vehicles vary throughout the world. A vehicle which is compliant in one market may not be compliant in another market. In this case, a production North American class 8 truck was being prepared for sale overseas. The requirement to meet European Union (EU) pass-by regulations as tested per the EU standard meant development of a production feasible package to substantially reduce noise emissions without changing any fundamental design or operating parameters of the truck. The development testing was done on a chassis dynamometer in a hemi-anechoic chamber without any specific pass-by noise simulation software. Efforts to develop a reasonably accurate correlation from lab to track, use of acoustic beamforming for source localization and package design iterations leading to a final successful package are discussed.
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