AN APPROXIMATION METHOD FOR RECOVERING THE ACOUSTIC WAVE IMPEDANCE COEFFICIENT
反演声波阻尼系数的一个逼近方法

The inverse time-hormonic acoustic scattering problem we are considering in this paper is to recover the impedance coefficient from the far field pattern of the scattered wave.An approximation method is presented and the conversgence of this method is proven.Numerrical examples are given showing that this method is both accurate and simple to use.