EFFECTS OF LOAD, INFLATION PRESSURE AND TIRE DEFLECTION ON TRUCK TIRE NOISE LEVELS

SAE Recommended Practice J57a--Sound Level of Highway Truck Tires--specifies that the tests be made using tires inflated to the maximum inflation pressure and loaded to the maximum load as specified by the Tire and Rim Association (T&RA). However, if local load limits preclude the use of the maximum rated load, tests may be conducted using lower loads if the inflation pressure is adjusted either to maintain constant tire deflection or according to the T&RA load/inflation pressure tables. Whether these alternate load/inflation pressure conditions result in similar sound levels is an important question. This report presents acoustic data that allows evaluation of the equivalency of these alternate conditions. In addition, laboratory data on the relationships between load, inflation pressure, and tire deflection are presented.

  • Corporate Authors:

    National Bureau of Standards

    14th Between E Street and Constitution Avenue, NW
    Washington, DC  USA  20234

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Kilmer, R D
    • Cadoff, M A
    • Mathews, D E
    • Shoemaker, COJ
  • Publication Date: 1979-1

Media Info

  • Pagination: 49 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00197594
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NBSIR-78-1570 Final Rpt., DOT-HS-803-874
  • Files: NTIS, TRIS, USDOT
  • Created Date: Aug 28 1979 12:00AM