ACTIVE CONTROL OF MARINE NOISE USING THE SOUND INTENSITY TECHNIQUE

The paper presents the application of the sound intensity technique to the graphical presentation of the spatial distribution of the intensity field radiated by the section of cabin walls with windows. For the region of the window box there is illustrated a two- dimensional flow map of the time-averaged active intensity space vector as a projection onto the measured ,,xy'' plane and a vector ,,z'' perpendicular to the measured plane. Additionally, the distribution of the acoustic energy streamlines is presented. The analysis of an acoustic field shape produced near the windows of a ship's cabin before and after installing the shipboard wall makes it possible to estimate local radiation sources and regions of vibro-acoustic bridges through which the energy is passed over to the shipboard wall of the cabin. The tests also enable the estimation of how the lack of vibro- acoustic bridges and window isolation sheltering affect a level of the noise being radiated into the cabin.

  • Supplemental Notes:
    • Marine Technology & Transportation: ODRA 95, 1st Intl Conf on Marine Technology; 20-22 Sept 1995; Szczecin, Poland & MARTRANS 95, 1st Intl Conf on Marine Transport in the 21st Century; 30 Aug-1 Sept 1995; Plymouth, UK. Procs. Publ by Computational Mechanics Publications, UK, ISBN 1 853123307. Section 6, p 343 [8 p, 9 ref, 3 fig]
  • Authors:
    • Weyna, S
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00719038
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 27 1996 12:00AM