In this report the results of an investigation into the extent to which tyre noise emissions from road vehicles can be reduced by attaching special screens to the vehicle are presented. Different types of screen prototypes were manufactured and the tyre noise emission levels at a distance of 7,5 M from free rolling vehicles were measured when passing the microphone at different speeds on dry and wet road surfaces. The evaluation of the sound levels from different types of screens compared to the levels from the vehicle equipped with standard mudguards indicated that the most effective type gave reductions of the tyre noise on dry roads of 5 plus or minus 2 db(a) and on wet roads of 2 plus or minus 4 over 2 db(a). When a noise absorbing material was attached inside the screens, the reductions increased to about 7 plus or minus 3 db(a) on dry roads and to 4 plus or minus 2 db(a) on wet roads. The investigation of screen properties included technical tests such as braking tests, splashing tests and measuring the increase in the tyre tread temperature. /TRRL/

  • Corporate Authors:

    IFM Akustikhyraan AB

    Warfvinges Vaeg 26
    Stockholm,   Sweden 
  • Authors:
    • Gadefelt, G
    • Voight, P
  • Publication Date: 1976


  • Swedish

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: 48 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00159717
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: No. 3.634.04 Monograph
  • Files: ITRD, TRIS
  • Created Date: Mar 29 1978 12:00AM