THE FOURIER TRANSFORM APPLIED TO VEHICLE EXTERIOR NOISE SOURCE IDENTIFICATION

This paper discusses a motor vehicle noise source identification technique designed for use during the SAE J986a or similar drive-by test procedure. It provides, by application of the Fourier Transform, the capability to obtain a narrowband (9.8 Hz) frequency resolution over an extended frequency range (0-10,000 Hz) at the peak vehicle noise level, a particular RPM, or a particular vehicle location in the test zone. Other features include corrections for the Doppler shift, averaging of noise tests, and subtraction of spectra of two separate noise tests from a component disconnect/reconnect procedure. /GMRL/

  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Daniels, V A
    • Veres, R E
  • Publication Date: 1976-2

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00145201
  • Record Type: Publication
  • Report/Paper Numbers: SAE #760151
  • Files: TRIS
  • Created Date: May 11 1977 12:00AM