This paper deals with initial measurements of the acoustic pressure levels radiated by the modern and largest merchant ships -- the supertankers, greater than 100 thousand DWT, in the frequency band 2 to 80 Hz. Those shaft and blade rate lines detected are converted to source pressure levels (SPL) in dB// mu Pa at 1m. For some selected lines a typical radiation pattern is constructed. A comparison is made of the measured and calculated blade rate tonals and a discussion is presented on several mechanisms for the enhancement of their harmonics.

  • Supplemental Notes:
    • Oceans '77 Conference Record Third Annual Combined Conference, Los Angeles, California, October 17-19, 1977.
  • Corporate Authors:

    Institute of Electrical and Electronics Engineers (IEEE)

    3 Park Avenue, 17th Floor
    New York, NY  United States  10016-5997

    Marine Technology Society

    5565 Sterrett Place, Suite 108
    Columbia, MD  United States  21044
  • Authors:
    • Cybulski, J
  • Publication Date: 1977

Media Info

  • Features: References;
  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00178985
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: 77CH1272-4 OEC
  • Files: TRIS
  • Created Date: Aug 19 1978 12:00AM