Applications of the intensity technique to ship structures: Sound absorption, radiation and transmission loss

Pertti Hynnä

Research output: Book/ReportReport

Abstract

A literature survey on applications of sound intensity technique to the measurement of sound radiation efficiency, transmission loss and absorption of paneltype ship structures is given. Some basic theory for the calculation of sound radiation efficiency and sound transmission loss of single and double panels is presented. Equations of the sound intensity measurement technique in different applications are given. Measurement results obtained with the intensity technique are compared with results of conventional or standardised methods based on literature. The effects of stiffening, holes and slits on the acoustic properties of partitions, which are important in practice, are reviewed. Many of the equations for sound radiation efficiency and transmission loss were programmed as subroutines and included in the SEA (Statistical Energy Analysis) program package developed at the VP Ship Laboratory.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages62
ISBN (Print)951-38-3637-1
Publication statusPublished - 1990
MoE publication typeNot Eligible

Publication series

SeriesValtion teknillinen tutkimuskeskus. Tiedotteita
Number1086
ISSN0358-5085

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Keywords

  • ship structural components
  • shipbuilding
  • hulls (structures)
  • acoustic absorption
  • sound transmission
  • intensity
  • transmission loss
  • panels

Cite this

Hynnä, P. (1990). Applications of the intensity technique to ship structures: Sound absorption, radiation and transmission loss. VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tiedotteita, No. 1086