IDENTIFICATION OF INFRASOUND GENERATION MECHANISMS IN A BUS

This paper presents the results of experiments conducted to investigate infrasound generation in a bus. The bus was driven on a smooth road, both upwind and downwind, and with and without damping of window vibrations. It was also run on an uneven road for comparison. The results show that by damping the window vibrations it was possible to reduce the infrasound levels significantly. It is also concluded that higher air turbulence around the bus slightly increases the infrasound outside the frequency range of the axle resonance. Finally, it is concluded that road roughness as well as tyre "roughness" (unbalance or run-out) excite vibration and infrasound. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03476030
• Corporate Authors:

  Swedish National Road and Traffic Research Institute

  Drottning Kristinas Vaeg 25
  S-11428 Stockholm,   Sweden 
• Authors:
  • Sandberg, U
• Publication Date: 1989

Language

• English

Media Info

• Pagination: 7 p.
• Serial:
  • VTI SAERTRYCK
  • Issue Number: 140
  • Publisher: Swedish National Road and Transport Research Institute (VTI)
  • ISSN: 0347-6030

Subject/Index Terms

• TRT Terms: Buses; Damping (Physics); Infrasound; Pavements; Smoothness; Tests; Vibration; Wind; Windshields
• ITRD Terms: 5559: Damping; 3071: Evenness; 6749: Infrasonic noise; 2955: Pavement; 6255: Test; 5558: Vibration; 2554: Wind; 1311: Windscreen (veh)
• Subject Areas: Pavements; Public Transportation;

Filing Info

• Accession Number: 00605860
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Mar 31 1991 12:00AM