Finite/infinite element method for the acoustic radiating problem

The paper considers the exterior acoustic field produced by an arbitrary structure immersed in an infinite homogeneous fluid and vibrating at constant frequency. The acoustic radiating problem is solved by a combination of the finite element method (FEM) and the infinite element method (IEM). The field information is usually obtained from the Kirchoff integral using the computed surface information. Compared to the boundary element method, this combination method yields significantly greater computational efficiency. Furthermore, the method is easy to understand and extend.