Determination of Surface Acoustic Admittances by Inverse Solution of Finite Element Modeling in the Pipes
This paper presents an approach to determination of acoustic admittances by solving inverse problem which is obtained from finite element modeling. The authors detail the inverse problem and its general eigen-function and introduce an optimization method to obtain boundary conditions by known geometries in a discrete domain and the lowest propagating frequencies and their corresponding attenuations. This method is practical because it only needs few eigen value information rather than full information of the eigen values. Comparison of acoustic experimental results and calculated results, which match well, is given to validate the method.
Riza Esa and Yanwen Wu
Y. A. Yin et al., "Determination of Surface Acoustic Admittances by Inverse Solution of Finite Element Modeling in the Pipes", Advanced Materials Research, Vols. 301-303, pp. 870-875, 2011