NOISE REDUCTION IN VEHICLES DURING DEVELOPMENT AND SERIES PRODUCTION

GERAEUSCHBEKAEMPFUNG IN FAHRZEUGEN WAEHREND DER ENTWICKLUNG UND DER SERIENFERTIGUNG

The report deals with measures for reducing noise levels during the development of the vehicles and their practical consequences. First the initial acoustic condition of a bus with underfloor engine is described. Experiments and measures for reducing noise levels are described and illustrated graphically. Finally the theoretical and experimental verification of the measures is discussed. The second part of the report deals with the evaluation of observations and controls in applying the developments in noise reduction to series production. The most important result is that measures for noise reduction developed in the prototype only have comparable effect in series production if: (1) no additional sources of noise such as air conditioning units, heaters, etc, are installed. (2) no parts such as gear boxes, differentials, etc, which differ from those of the prototype are used. (3) that the series vehicles are carefully assembled and that only carefully selected materials are used. It was also proved to be impossible to control the efficiency of sound moderation measures by comparing a single improved vehicle with A single sample of the unimproved design. Rather it is necessary to have a larger number of one type to compare with a larger number of the other type. /TRRL/

  • Corporate Authors:

    Franckhlsche Verlagshandlung

    Pfizerstrasse 5, Postfach 640
    7000 Stuttgart 1,   Germany 
  • Authors:
    • KURZ, K
    • Toetoes, K
    • Horvath, M
  • Publication Date: 1976-5-6

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00179974
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: Sep 27 1978 12:00AM