1990

Hynnä, Pertti

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.