Continued tightening of motor vehicle external noise legislation places an ever increasing burden upon manufacturers to meet more stringent noise requirements. Techniques for reduction of pass-by test levels require detailed knowledge of source strengths and positions on the vehicle. Recently developed methods of data acquisition and analysis are described. The presentation of the results of pass-by tests in the form of spectrum maps with correction for the effect of doppler shift is shown. A computer program is developed to predict noise and vehicle performance during the pass-by test from fundamental vehicle and component data, thereby enabling the evaluation of changes in vehicle design or test standards.

  • Supplemental Notes:
    • ISATA 83. Volume 2. International Symposium on Automotive Technology and Automation with particular reference to Electronics and Energy Saving in the Automotive Industries: Product and Process, Cologne, 19-23 September 1983.
  • Corporate Authors:

    Automotive Automotion Limited

    42 Lloyd Park Avenue
    Croydon CRO 5SB, Surrey,   England 

    Ford Werke AG

    ,   Germany 
  • Authors:
    • Townsend, G
  • Publication Date: 1983

Media Info

  • Features: Figures;
  • Pagination: 22 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00393229
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: HS-037 294
  • Files: HSL, USDOT
  • Created Date: Mar 29 1985 12:00AM