EXTERIOR-RADIATED AERODYNAMIC NOISE OF VEHICLES AT HIGHWAY SPEEDS

Aerodynamic noise due to airflow over a vehicle moving at highway speeds has usually either been ignored, or postulated to be a negligible part of the total exterior noise of the vehicle. In part, this may have been due to the difficulty in separating aerodynamic noise from the other components of vehicle noise. In the investigations discussed here, a technique was developed to make this separation possible. The technique was applied to a sampling of six light vehicles: four different sizes and shapes of passenger cars, a pickup truck, and a window van. The noise data for each of three major components is presented in the form of A-weighted levels as a function of vehicle type, groud-speed, and directivity. It is shown that the aerodynamic noise component is not negligible in comparison to the other two components. Various implications of this newly defined importance of aerodynamic noise are discussed including those relating to tire noise testing.

Media Info

  • Pagination: p. 711-714

Subject/Index Terms

Filing Info

  • Accession Number: 00193808
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: May 26 1982 12:00AM