This paper presents transmission loss prediction models for a periodically stiffened panel and and stiffened double panel structures using the periodic structure theory. The inter-panel cavity in the double-panels structures can be modelled as being separated by an airspace or filled with an elastic porous layer in various configurations. The acoustic behavior of the elastic porous layer is described by a theory capable of accounting fully for multi-dimensional wave propagation in such materials. The predicted transmission loss of a single stiffened panel is compared with the measured data.
Sound transmission, Periodic structures, Double panels, Elastic porous materials
Acoustics and Noise Control
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