Measurements of the noise experienced within three vehicles have been made at various speeds on different types of road surface. No correlation between sound level and subjective reaction has been achieved in the tests described. It is concluded that it is the composition of the sound, and not the sound level per se, which determines the acceptability of the noise experienced. At 100 km/h (60 mph) the concrete surfaces comprising deep transverse grooves yielded slightly higher sound levels than did the other surfaces, but, at 65 km/h (40 mph), the sound levels recorded on these grooved surfaces were less than those on the other surfaces. Those concrete surfaces which comprised grooves at a constant pitch of 28 mm yielded a predominant single tone noise which, although detectable at all speeds, was considered to be most objectionable at 65 km/h (40 mph). Measurements made on a section of a concrete road textured by the plastic grooving machine, such that the grooves were at centres varying from 200 to 60 mm, have indicated that the increase in noise over that of the adjecent brushed concrete surface was spread over two octaves. This slight increase in sound level only occurred at 100 km/h (60 mph) but at all speeds the noise generated on this surface was considered unlikely to stimulate any subjective reaction. Further work on the effects of randomizing the spacing of transverse grooves, whether formed or sawn in concrete, on both the noise level and skidding resistance, is considered a desideratum.

  • Corporate Authors:

    Cement and Concrete Association

    52 Grosvenor Gardens
    London SW1W 0AQ,   England 
  • Authors:
    • Maynard, D P
    • Lane, F E
  • Publication Date: 1971-8

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00132650
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Tech. Note No. 2 Monograph
  • Files: ITRD, TRIS
  • Created Date: Nov 9 1977 12:00AM