Prediction of the vibroacoustic response of a structure-liner-fluid   system based on a patch transfer function approach and direct experimental   subsystem characterisation
  The vibro-acoustic response of a structure-liner-fluid system is predicted by application of a patch impedance coupling methodology. In contrast to existing numerical approaches, impedance matrices of structure and liner are determined by a direct experimental approach, avoiding the requirement of material parameters. Emphasis is placed on poroelastic lining materials. The method accounts for surface input and transfer terms and for cross and cross-transfer terms through the specimen. A single test-rig characterisation procedure for layered poroelastic media is proposed. The specimen is considered as a single component -- no separation of layers is necessary. Problem specific boundary conditions for skeleton and fluid, which may cause non-reciprocal cross terms, are dealt with by the procedure. Methods of measurement for the assessment of impedance matrices are presented and their accuracy and limitations are discussed. An air gap correction method for surface impedance measurements is presented. 
Christopher G. Albert, Giorgio Veronesi, Eug\`ene Nijman, Jan Rejlek
physics.class-ph