对四阶声低通滤波光纤水听器的声压灵敏度频响特性进行了详细的理论和实验研究.在已有的低频集中参量模型中引入了一个机械声阻,用于描述系统的机械损耗,从而得到了改进的声学等效电路.相位频响特性对于光纤水听器的阵列应用非常重要,关系到阵列的波束形成效果,进而影响系统定位、识别与跟踪目标的能力,因此在分析幅度频响特性的同时研究了相位频响特性.仿真分析了各主要参量对声压传递函数的影响,得到了一些对声低通滤波光纤水听器设计具有重要指导意义的结论.实测声压灵敏度频响曲线与仿真结果基本一致,较好地验证了理论分析的正确性.四阶声低通滤波光纤水听器的研制成功,对于提高光纤水听器阵列的抗高频混叠性能具有重要的作用. A detailed theoretical and experimental study on the frequency response of the fourth-order acoustic low-pass filter hydrophone is carried out.A mechanical acoustic impedance is introduced into the existing low-frequency lumped parameter model to describe the mechanical loss of the system , So that an improved acoustic equivalent circuit is obtained.The phase frequency response is very important for the array hydrophone application and affects the beamforming effect of the array and thus affects the ability of the system to locate, identify and track the target. Therefore, Frequency response characteristics of the phase noise characteristics of the phase at the same time studied the impact of the main parameters of the sound pressure transfer function simulation obtained some of the acoustic low-pass fiber optic hydrophone design has an important guiding significance Conclusion Measured sound pressure sensitivity The frequency response curve is basically the same as the simulation result, which proves the correctness of the theoretical analysis.The successful development of the fourth-order acoustic low-pass filter hydrophone is very important to improve the anti-high frequency aliasing performance of the fiber hydrophone array Role.