中文摘要：

为了对抗来自水下的＂非对称＂威胁小目标,以携带开放式呼吸器的蛙人作为研究对象,对蛙人的肺部组织、氧气瓶和呼吸产生的气泡的目标强度进行了仿真和实验研究,并测量了不同姿态蛙人的目标强度,分别给出了水池和湖中的测量结果;根据水池和松花湖测量数据,对呼吸声和呼吸器减压阀等辐射源噪声的时频特性进行了分析,并给出了蛙人呼吸声声源级估计的结果。

英文摘要：

To counter ‘asymmetric’ threats from underwater small target, the diver carrying with open-circuit SCUBA is conducted as research target. The simulation and experimental researches on the target strengths of lung tissue of diver, oxygen tanks and breathing bubbles have been carried out. The tank and lake experiments are conducted and the results of the tests are given. Target strengths of diver in different poses are measured in lake experiment. The time-frequency characteristics of the frogman breathing and the pressure reducing valve noise are analyzed, and the experimental results of diver radiated noise in different movement rhythms are obtained.