The problem of subway car wheels screeching along the tracks is receiving practical attention by the use of a new wheel. Developed specifically by Standard Steel, it can reduce noise levels above 90 decibels, which can be harmful to human ears. Slated to be used initially on standard light rail vehicles in Boston and San Francisco, the"Acousta Flex" is the most effective design so far in eliminating wheel-track interface, the source of the noise. Patterned after a wheel designed for BART, it is composed of an aluminum center, which lessens its weight, and a steel tire which absorbs the wear and can be replaced when fully worn. It also incorporates acoustic features which suppress the noise. The design of the Acousta Flex emerged after much testing, and other research still continues for other noise-reducing wheels. One such wheel is the Penn Cushion Wheel, which has a special rubber cushion design. Noise levels depend on many factors, and the amount of the reduction varies. With this design, it is usually between 20 and 50 percent.

  • Corporate Authors:

    Bobit Publishing Company

    1155 Waukegen Road
    Glenview, IL  United States  60025
  • Publication Date: 1975-3

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 10-12
  • Serial:
    • Metropolitan
    • Volume: 71
    • Issue Number: 2
    • Publisher: Bobit Publishing Company

Subject/Index Terms

Filing Info

  • Accession Number: 00084707
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 2 1981 12:00AM