Prediction of Structure Borne Sound Transmission Using Statistical Energy Analysis

Statistical Energy Analysis (SEA) is applied to analyze structure-borne sound transmission in complex structures. The system equation describing the energy flow in the structure is derived by the network formulation, and for saving the computational time, approximated formulae for SEA parameters are found. Measured and calculated results are fairly good agreed for 3D-plate structures, including a scale model of ship structure. Furthermore, the acousto-structural coupling problem is investigated, experimentally and theoretically, for both cases without and with additional absorbing treatment. From results, the measures for reducing the response in the receiving element and the effect of the treatment are shown.