A spatial impulse response based model for the acoustic field in detection of buried objects with low frequency WAVES

A number of mathematical models have been developed and used for received signal processing in acoustic detection of buried objects with low frequency waves up to now. Most of them are linear combination of signals and impulses of the system. They are too simple to make in-depth analysis of the parameters of the system. Then, a spatial impulse response based model is proposed for the acoustic detection system, which is derived from the basic theory of sound propagation and geometrical relation of the system. And the physical meaning of the model is explicit. In this way, the model can be applied to predict and determine the parameters of the detection system, and it is the basic theory in signal processing of the system. The simulated results and the measured received signals are compared, and it is shown that the simulated and measured results are in good agreement.