Parametric Study on the Efficiency of an Inverse Energetic Approach to Identify the Boundary Acoustic Sources

This paper presents a parametric study of the microphones distribution effect in the identification of the boundary acoustic sources acting in the acoustic cavities through the knowledge of the acoustic energy densities measurement. An energetic approach, also called the simplified energy method (MES) was developed to predict the energy densities distribution for the acoustic applications. MES can also be applied to structures to determine energy densities. This energy method can solve inverse problems in order to localize and quantify the structural and the acoustic boundary sources at medium and high frequency ranges, thanks the inverse formulation of this energetic approach (IMES). The main novelty of this paper is to study the performances of this inverse energetic approach in the quantification and localization of the boundary acoustic sources acting in the acoustic cavities. Numerical investigation concerning 3D acoustic cavity was performed to test the validity of the presented technique using different number of acoustic sources and distance between the microphones repartition and the cavity walls. The numerical results show that the inverse simplified energy method (IMES) has an excellent performance in identifying and detecting the boundary acoustic sources at medium and high frequency ranges from the knowledge of the acoustic energy densities measurement.