TRANSIT BUS NOISE CONTROL FEASIBILITY STUDY

THIS REPORT DEALS WITH A NOISE CONTROL FEASIBILITY STUDY ADMINISTERED BY THE WASHINGTON METROPOLITAN AREA TRANSIT COMMISSION, USING A DIESEL BUS FURNISHED BY THE D. C. TRANSIT SYSTEM. THE MAJOR OBJECTIVE OF THE NOISE CONTROL PROGRAM WAS TO EXPLORE AREAS OF POTENTIAL NOISE REDUCTION AND TO DETERMINE THE FEASIBILITY OF THE APPLICATION OF SPECIFIC TECHNIQUES WHICH COULD BE DEVELOPED INTO RETROFIT KIT FOR INSTALLATION ON EXISTING VEHICLES. THE FOUR AREAS INVESTIGATED UNDER THE PROJECT WERE: (1) DIRECT MECHANICAL NOISE RADIATION FROM THE POWER PLANT; (2) NOISE ASSOCIATED WITH THE ENGINE COOLING SYSTEM; (3) ENGINE EXHAUST SYSTEM NOISE; AND (4) ENGINE INDUCTION AIR SYSTEM NOISE. EQUIPMENT AND STRATEGIES RELATED TO THE FOUR NOISE AREAS AND THE TEST PLAN ARE DESCRIBED. THE RESULTS OF THE TESTS SHOWED THAT MOST OF THE NOISE CONTROL TREATMENTS CONTRIBUTED MEASURABLY TO THE OVERALL SOUND LEVEL REDUCTION. SUGGESTIONS ARE MADE FOR FURTHER INVESTIGATION, IMPROVEMENTS, AND DEVELOPMENT OF THE MORE PROMISING NOISE REDUCTION TREATMENTS INTO A RETROFIT KIT. AN APPENDIX OF TECHNICAL SUPPORT ACTIVITIES IS INCLUDED. /UMTA/

• Supplemental Notes:
  • REP NO: UMTA-IT-06-0022-72-1 Contract NO: IT-06-0022
• Corporate Authors:

  Washington Metro Area Transit Commission

  Washington, DC  United States 

  Urban Mass Transportation Administration

  400 7th Street, SW
  Washington, DC  United States  20590
• Publication Date: 1972-12

Media Info

• Pagination: 66 p.

Subject/Index Terms

• TRT Terms: Buses; Diesel engines; Engines; Feasibility analysis; Noise; Noise control; Retrofitting
• Old TRIS Terms: Engine noise
• Subject Areas: Environment; Highways; Public Transportation; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00223945
• Record Type: Publication
• Source Agency: Urban Mass Transportation Administration
• Report/Paper Numbers: Final Rep
• Files: TRIS, USDOT
• Created Date: Aug 20 2003 12:00AM