Inverse impedance identification using an efficient BEM strategy

Abstract

Limited accessibility often restricts the possibility of directly measuring the true acoustic properties of existing components. In that context, this paper investigates a hybrid approach for the inverse identification of the acoustic impedance of components, by combining microphone measurements with highly efficient acoustic Boundary Element Method (BEM) models. The modeling efficiency, achieved through a parametric model order reduction (pMOR) technique for BEM models [1], facilitates the fast transition among models with different impedance values and thus, greatly accelerates the inverse identification scheme. The effectiveness of the proposed technique is demonstrated with the well-studied example of the KU Leuven soundbox test setup [2].