This paper reviews general methods of identifying noise sources in machinery and in particular it describes in detail two methods which have been studied by the authors on a truck: near field measurements and the coherence technique. The results of these two methods are compared with results of a third method in which the same truck with different sources wrapped and then sequentially exposed was driven past a microphone using the SAE J366b test. The paper also reviews two different stationary indoor standard tests which have been investigated: the reduced drive-by simulation method, and the sound power method. These tests could be used to supplement (or replace) the standard SAE J366b drive-by test in some cases. Comparisons are made of data from the two tests developed and the SAE J366b drive-by data for the same truck.

  • Supplemental Notes:
    • This paper was presented at the SAE Meeting, Detroit, Michigan, February 27-March 3, 1978.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Crocker, M J
    • Sullivan, J W
  • Publication Date: 1978-3

Media Info

  • Features: References;
  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00178840
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: SAE 780387 Preprint
  • Files: TRIS
  • Created Date: Sep 27 1978 12:00AM