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一种新型声隔离系统
引用本文:周益明,王建中,张涛,翁国忠,翁汝莲,王佳麟.一种新型声隔离系统[J].声学技术,2013(6):519-523.
作者姓名:周益明  王建中  张涛  翁国忠  翁汝莲  王佳麟
作者单位:中国科学院声学研究所东海研究站,上海200032
摘    要: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。

关 键 词:偶极子  换能器  声隔离  声障板  声串漏

A new acoustic isolation system
ZHOU Yi-ming,WANG Jian-zhong,ZHANG Tao,WENG Guo-zhong,WENG Ru-lian,WANG Jia-lin.A new acoustic isolation system[J].Technical Acoustics,2013(6):519-523.
Authors:ZHOU Yi-ming  WANG Jian-zhong  ZHANG Tao  WENG Guo-zhong  WENG Ru-lian  WANG Jia-lin
Institution:(Shanghai Acoustic Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Shanghai 200032, China)
Abstract: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.
Keywords:dipole  transducer  acoustic isolation  acoustic baffle  acoustic leakage
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