Abstract
The purpose of this study is to investigate the influence of stiffening on the acoustic response of corrugated steel plates which are employed in building. The radiation efficiency and the transmission loss are determined. The former is deduced from vibrating velocity and intensity measurements and the latter from intensity measurements. Two samples were tested: the corrugated panel and a plane panel, both having the same mass per unit area. Experimental results are compared with results found in the literature. The transmission loss can be theoretically predicted as a function of the bending stiffnesses of the structure. The results show that existing analytical expressions are not valid for corrugated plates because they do not take into account all the physical mechanisms. Hence, a simulation has been developed in order to obtain a numerical solution. The mixed formulation developed consists in coupling the displacement functional of the structure with a boundary finite element method. The comparison of experimental results with these computed results demonstrates a good agreement up to 1000 Hz.
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