REV-IT (A NOISE INVESTIGATION OF AN AMF HARLEY-DAVIDSON 61 CU. IN. SPORTSTER MOTORCYCLE)

This presentation will describe the techniques and results of a noise investigation of an AMF Harley-Davidson 61 cu. in. Sportster motorcycle. The initial sound level testing, by definition, was to determine objectively the noise levels created by the machine under actual test conditions and to further determine the degree of contribution by engine exhaust, engine intake, and mechanical sources of noise. The latter category encompasses all noise generated by other than the engine intake and exhaust. The individual test configurations will be described in a brief discussion and utilizing photographic slides. Slides showing the relative degree of contribution of the overall sound levels from the major noise sources during stationary testing are compared to the standard production machine during stationary testing. These values are then used to approximate the contribution of each individual major noise source during pass-by tests per SAE J331 test procedure. SAE J331 test procedure was used as the foundation for the present California Highway Patrol test code which restricts the bystander noise levels for new motorcycles offered for sale within the state. Sound pressure level spectra of the engine exhaust and induction noise will be presented, describing the harmonic content. A brief discussion of the electronic instrumentation used for data acquisition and data reduction will also be included.

• Supplemental Notes:
  • Published in Inter-Noise '72 Conference Proceedings, Washington, D.C., October 4-6, 1972.
• Corporate Authors:

  Institute of Noise Control Engineering

  Iowa State University, 210 Marston Hall
  Ames, IA  United States  50011-2153

  Institute of Noise Control Engineering

  Iowa State University, 210 Marston Hall
  Ames, IA  United States  50011-2153
• Authors:
  • Hendrix, D R
• Conference:
  • Published in Inter-Noise '72 Conference Proceedings, Washington, D.C., October 4-6, 1972.
• Publication Date: 1972-10

Media Info

• Pagination: p. 312

Subject/Index Terms

• TRT Terms: Automobiles by type; Motorcycles; Noise; Sound level; Testing; Vehicle components
• Uncontrolled Terms: Vehicle make
• Old TRIS Terms: Motorcycle noise
• Subject Areas: Environment; Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00261226
• Record Type: Publication
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Oct 22 1974 12:00AM