Accurate computation of scattering poles of acoustic obstacles with impedance boundary conditions
Document Type
Article
Publication Date
1-2025
Department
Department of Mathematical Sciences
Abstract
We propose a computation method for scattering poles of impedance obstacles. Boundary integral equations are used to formulate the problem. It is shown that the scattering poles are the eigenvalues of some integral operator. Then we employ the Nyström method to discretize the integral operator and obtain a nonlinear matrix eigenvalue problem. The eigenvalues are computed using a multistep parallel spectral indicator method. Numerical examples demonstrate the high accuracy of the proposed method and can serve as the benchmarks. Our study provides a practical approach and can be extended to other scattering problems. This paper continues our previous study on the computation method for scattering poles of sound-soft obstacles.
Publication Title
Wave Motion
Recommended Citation
Liu, X.,
Sun, J.,
&
Zhang, L.
(2025).
Accurate computation of scattering poles of acoustic obstacles with impedance boundary conditions.
Wave Motion,
132.
http://doi.org/10.1016/j.wavemoti.2024.103425
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p2/1409