本文介绍一种接收接收换能器指向性凹陷方法，旨在控制接收换能器指向性来提高实收实发系统中的声隔离度。通过在换能器表面黏贴吸声、反声材料，减小换能器在指定方向接收到的声波，从而形成该方向指向性的凹陷。不同黏贴方式下的对比试验结果表明：该方法可使接收换能器在指定方向形成−20 ~ −10 dB的指向性凹陷，且实施简单、成本低廉，可为实收实发、声隔离等技术及装备的实现提供支撑。
This paper introduces a method of directivity depression of receiving transducer, which aims to control the directivity of receiving transducer to improve the acoustic isolation in the receiving and transmitting system. By sticking sound absorption and anti sound materials on the surface of the transducer, the sound wave received by the transducer in the specified direction is reduced, so as to form a directional depression in the direction. The comparative test results under different sticking methods show that this method can receive the transducer to achieve -20 ~ -10dB directional depression in the specified direction, and it is simple to implement and low-cost. It can provide a strong support for the realization of technologies and equipment such as actual receiving, actual transmitting and acoustic isolation.
2023,45(11): 123-126 收稿日期：2022-05-31
DOI：10.3404/j.issn.1672-7619.2023.11.024
分类号：TB565
作者简介：高立(1989-),男,硕士,工程师,研究方向为水声工程
参考文献：
[1] 赵龙龙. 水下无人航行器声学系统实收实发声隔离度分析研究[J]. 声学技术, 2017, 36(3): 228–232
[2] 徐盛瀛, 刘雨东. 声诱饵简化模型隔离度数值仿真计算[J]. 声学与电子工程, 2019, 年(4): 39–41
[3] 吴培荣. 基于边收边发技术的声隔离度研究[J]. 声学技术, 2013, 32(4): 281–283
[4] 滕舵, 杨虎, 李道江. 水声换能器基础[M]. 西安: 西北大学工业出版社, 2016: 141-142.
[5] 周益明, 王建中, 张涛, 等. 一种新型声隔离系统[J]. 声学技术, 2013, 32(6): 519–523
[6] 何祚镛, 赵玉芳. 声学理论基础[M]. 北京: 国防工业出版社, 1981: 68.
