A "semi" anechoic room design has been proposed and constructed from readily available, inexpensive construction materials. To demonstrate its feasibility, noise testing was conducted using a rotary engine as the noise source. The results of the testing indicated that the design is functional since free field conditions exist. This condition was proven to exist for at least one angluar position measured relative to the exhaust pipe and in the horizontal plane of the exhaust pipe. Other information is provided concerning engine behaviour and type of noise radiated. /GMRL/

  • Supplemental Notes:
    • Presented at the SAE Congress and Exposition, Detroit, 27 February-3 March 1978. Sponsored by National Research Council of Canada.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • GASPAR, R
    • Reif, Z
    • Sridhar, K
  • Publication Date: 1978-2

Media Info

  • Features: References;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00183067
  • Record Type: Publication
  • Report/Paper Numbers: SAE 780171, HS-025 320U
  • Contract Numbers: NRC-A-2190
  • Files: HSL, TRIS
  • Created Date: Dec 12 1985 12:00AM