ACOUSTICS APPLIED TO CAR BODY DESIGN

ANGEWANDTE KAROSSERIE-AKUSTIK

Methods hitherto used have been confined to the metrological description of the sound introduction and transmission behaviour. A newly developed method is proposed, which requires a minimum of standard devices and no special requirements in the measurement area. The technique is based on the idea of obtaining a prediction for discrete individual points of the body, insofar as these contribute to the sound transmission mechanism of the vehicle body. By the use of the technique under acoustically difficult environmental conditions, a check must be made on whether the influences of noise are stationary and whether they are easy to separate in the spectrum. Those tone sustaining noise spectra (e.g. ventilation noises) are particularly easy to eliminate, if the noise frequencies lie outside the problem zone being studied or where the signal to noise ratio is sufficiently large. The method is in principle not limited to flexural waves in the car body, but also provides an insight into the sound transmission mechanism of the body just where it is necessary to apply optimum measures regarding dimensions and location. A concrete example is provided which demonstrates the usefulness of the technique in vehicle development. /TRRL/

  • Corporate Authors:

    Franckhlsche Verlagshandlung

    Pfizerstrasse 5, Postfach 640
    7000 Stuttgart 1,   Germany 
  • Authors:
    • Sorgatz, U
    • WEBER, O
  • Publication Date: 1977-7-8

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00189157
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: May 26 1979 12:00AM