Since 1975, the U.S. Environmental Protection Agency (EPA) has imposed tough Congressionally-approved noise curbs on the manufacturers of medium- and heavy-duty interstate commercial trucks. Truck makers already have met EPA's 86 dB(A) and 83 dB(A) noise levels with cosmetic changes and generally little impact on vehicle design and costs. Compliance has been achieved by the use of double wall exhaust pipes and dual double wrapped mufflers, cooling fan clutch, engine compartment side shields and absorption material. An outline is given of further attempts to reduce truck noise.

  • Availability:
  • Corporate Authors:

    Automotive Industries International

    Chilton Way
    Radnor, PA  United States  19089
  • Authors:
    • Stark, J A
  • Publication Date: 1978-9

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00196319
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Sep 15 1979 12:00AM