Abstract:

A directly coupled boundary element and finite element model has been applied to the dynamics of acoustic silencers exhibiting flexible surfaces. In this coupled BEM--FEM formulation, the BEM model used a three-node isoparametric triangular linear continuous element to discretize the acoustic cavity. The BEM model was coupled to a flat shell FEM model. The formulated model was then used to predict the performance of various silencer configurations. In a parallel study, the BEM model was used to study the various parameters affecting the performance of vented earmolds coupled to a headset driver and the ear canal. The preliminary findings from this effort will be presented. [See NOISE-CON Proceedings for full paper.]