一种新型声隔离系统

水声换能器的收／发声隔离度决定了很多水声设备的性能优劣。介绍了一种新型声学隔离系统，该系统改变了声障板的设计思路，使换能器的收／发声串漏得到明显降低。通过偶极子原理，提出了一种提高收／发声学隔离度的方案。利用有限元仿真手段，计算并验证了该种方案的有效性。参照仿真模型，制作了一套声隔离系统样机，在1个倍频程的频带内，该系统的收／发声隔离度大于40dB。该声隔离系统提高了现有水下声目标模拟设备的性能。

A new acoustic isolation system

It is known that the performance of an underwater acoustic equipment closely depends on the acoustic R-T isolation of a transducer, i.e. the acoustic isolation between receiving and transmitting of the transducer. This paper in- troduced a new acoustic isolation system, in which the design of an acoustic baffle was changed so that the transducer＇s R-T leakage decreased obviously. A method of advancing the acoustic R-T isolation was presented according to the dipole theory. The effectiveness of this method was evaluated and verified by the finite element simulation. Based on the simulation model, an acoustic isolation prototype system with an acoustic R-Tisolation greater than 40dB in an octave was developed which significantly improved the performance of an existing underwater acoustic target simulator.