Impulse response is one of the absolutely necessary data in the modern scientific fields,such as resource exploration, directional design. In this paper, a effective numrical methodis obtained by the techniques of reducing the singularity and characteristics differences.Some examples are given.
The paper presents a new method to identify the acoustic speed and density simultaneously. Its distinguishing feature is directly on the baize of differential equations without introducing integral equations in the whole precedure. The algorithm is simple and fast, which easily come true on computers.
