Abstract:

Recently, a tri-dimensional finite-element model predicting the vibro-acoustic behavior of multilayer systems containing Biot poroelastic materials have been developed [R. Panneton and N. Atalla, J. Acoust. Soc. Am. 100, 346--354 (1996)]. The objective of the current paper is to validate the finite-element model with experimental measurements. Three experimental validations are proposed: (1) measurements versus FEM predictions of the surface impedance of a poroelastic material using an impedance tube; (2) measurements versus FEM predictions of the vibrations of a plate bonded to a poroelastic layer; and (3) measurements versus FEM predictions of the vibration transmission loss through a double plate system containing a poroelastic material. Results of the FEM predictions agree very well with the measurement results. [Work supported by NSERC, FCAR, and Bombardier Inc. Canadair.]