Study On Line Array Gesture Influence On Space Gain In Reverberation Field

Reverberation field is a anisotropy field. Generally, the array gain is constant in the isotropy field, the conclusion is correct. But, in the anisotropy field the conclusion is not. The array gain is also related with reverberation space-distribution. Because the reverberation function is worked out hardly. The thesis simulate reverberation based on unit scatter model and study on array gain in different gesture, compared with the array gain characteristics of different gesture under isotropy noise, found out the difference between them and the rule of array gain in reverberation field. In computer simulation, the reverberation signal of different roll and pitch array is simulated, beamformed in fixed bearing and compute the array gain. The tank experiment is designed according to the simulation model, analyzed and processed the experiment datas. By simulation and experiment the result is: in the isotropy noise field, the array gain is invariable when the array angle change; but in reverberation field, the array gain increases when the pitch angle increases, and the array gain decreases when the roll angle increase.