关键词：正常模式；宽带声传播模型；噪声干扰；电子信息
摘 要：In a long time,the specialists in underwater acoustic countermeasure field were used to get an approximate evaluation of the transmission loss of noise signals by spreading loss equation of spherical wave,which led to results with a low accurateness.Based on normal mode theories and discrete Fourier transformation (DFT),derived the composition and process of the broadband acoustic propagation model.Then the transmission loss could be calculated via this propagation model,which could get a relatively more accurate result.The influence of three key positional parameters,the orientation,distance and depth of the noise-jammer were studied in this paper.The method and conclusions in this paper can provide a reliable foundation for tactical research on noise-jammers.