Abstract: The development of acoustic infinite element method is rapid in recent years. Compared to the other methods in exterior field besides boundary element method, the efficiency of acoustic infinite element is very superior. Thus this method can handle the full range of frequencies and structural complexities. Essentialize the introduction of acoustic infinite element method, principle and early acoustic infinite element method. Then the recent acoustic infinite element method as four types is classified by the novelty and attention and essentialize each method’s principle, the problems and the answer. Finally, the expectation of acoustic infinite element method is described.

Key words: Wave envelope method, Acoustic infinite element method, Burnett method, Galerkin-weighted residual method, Laghrouche method, Al/Steel, arc welding, flow behavior, magnetic field, temperature field