中文摘要：

基于射线理论分析了在深海情况下海面声源产生声场的频率-距离干涉结构,给出了影区内声场频率-距离干涉结构的近似理论表达式,分析得到影区内声场频域干涉周期随收发距离的增加而增大、随着接收水听器深度的增加而减小。因此由单水听器记录的声场干涉结构即可实现被动声源距离估计。在南海深海实验中观测到海面宽带噪声源在声场影区形成的声场干涉结构,对实验获得声场干涉结构的处理结果验证了深海声场影区干涉结构用于被动声源距离估计的有效性。与传统的匹配场被动定位方法相比,该方法不需要已知海底声学参数和大规模的拷贝场计算。

英文摘要：

The sound field frequency-range interference patterns of sea-surface source in deep water are discussed based on ray theory.Approximate formulae of the sound field frequency-range interference patterns in the shadow zone are provided.In the shadow zone,the interference cycle decreases with the increase of the depth of the receiver and increases with the increase of the propagation range.As a result,the source range can be extracted from the interference cycle of the sound intensity using a single hydrophone.The sound field interference patterns caused by sea-surface broadband noise sources in the shadow zone have been observed in a deep sea experiment in the South China Sea.The availability of the shadow zone sound field interference structure in the passive source range estimation is verified by experimental data.Compared with conventional matched field passive source localization method,this method doesn＇t need seafloor acoustic parameters and large scale computing of replica fields.