TRUCK NOISE IX. NOISE REDUCTION STUDY OF AN IN-SERVICE DIESEL-POWERED TRUCK. VOLUME I: TEXT

A series of tests to measure the noise contributions of subsystems were performed on a truck with a conventional short cab, equipped with a Cummins V-903 engine. The data acquired in these tests were used to select retrofittable components which would effectively reduce the total vehicle noise. The final truck had the original induction system, a new single vertical late model muffler, a clutched fan drive and engine covers. All of the retrofitted components are commercially available and in stock. The total cost of all three changes is between $1000 and $1445 for a 3 dBA noise reduction. A 2 dBA noise reduction could be attained with engine covers only at a cost of from $470 to $770.

• Supplemental Notes:
  • See also Volume 2, PB-264 784.
• Corporate Authors:

  McDonnell Douglas Astronautics Company

  5301 Bolsa Avenue
  Huntington Beach, CA  United States  92647

  Transportation Systems Center

  55 Broadway, Kendall Square
  Cambridge, MA  United States  02142

  Department of Transportation

  Office of the Secretary of Transportation, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Leneman, G
• Publication Date: 1977-2

Media Info

• Pagination: 72 p.

Subject/Index Terms

• TRT Terms: Costs; Damping (Engineering); Diesel engines; Diesel trucks; Emission control systems; Engines; Exhaust gases; Fans; Mufflers; Noise; Noise control; Retrofitting; Traffic noise; Trucks; Vehicle cabs
• Uncontrolled Terms: Enclosures; Noise reduction
• Old TRIS Terms: Engine noise; Truck noise
• Subject Areas: Environment; Finance; Highways; Motor Carriers; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00153972
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: DOT-TSC-OST-76-3-I Final Rpt.
• Contract Numbers: DOT-TSC-764-1
• Files: NTIS, TRIS, USDOT
• Created Date: Jun 17 1977 12:00AM