| 声腔对电动式换能器工作特性的影响 |
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| 引用本文： | 桑永杰,蓝宇,刘茂伊.声腔对电动式换能器工作特性的影响[J].声学学报,2022,47(1):76-84. |
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| 作者姓名： | 桑永杰 蓝宇 刘茂伊 |
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| 作者单位： | 1. 哈尔滨工程大学 水声技术重点实验室 哈尔滨 150001; |
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| 基金项目： | 国家自然科学基金项目(11304057);水声技术重点实验室稳定支持课题项目(JCKYS2019604SSJS004)资助。 |
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| 摘 要： | 传统的电动式换能器设计理论中,未考虑压力补偿系统等声腔结构对声学性能的影响,声源级理论设计结果与实测结果存在较大差别.研究中将电动式换能器内部的三段气腔视为突变截面声腔结构,给出了声腔的四端网络等效电路,将其作为辐射面的负载添加到电动式换能器的传统等效电路中,获得了电动式换能器改进的等效电路.基于改进的等效电路求解了带...
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| 关 键 词： | 电动式换能器 声腔 声源级 声阻抗 等效电路 |
| 收稿时间： | 2020-09-20 |
The influence of acoustic cavity on operating characteristics of electrodynamic transducer |
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| SANG Yongjie,LAN Yu,LIU Maoyi.The influence of acoustic cavity on operating characteristics of electrodynamic transducer[J].Acta Acustica,2022,47(1):76-84. |
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| Authors: | SANG Yongjie LAN Yu LIU Maoyi |
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| Affiliation: | 1. Acoustic Science and Technology Laboratory Harbin Engineering University, Harbin 150001;2. Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001;3. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001 |
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| Abstract: | The influence of acoustic cavity structure on the acoustic performance of electrodynamic transducer is not considered in traditional design theory.It leads to a big difference between the theoretical design results and the measured results.In the research,the three-segment air cavity inside electrodynamic transducer is regarded as the abrupt cross-section acoustic cavity,the equivalent circuit of the acoustic cavity is added to the traditional equivalent circuit of electrodynamic transducer.Then the improved equivalent circuit of electrodynamic transducer is obtained.Based on the equivalent circuit,the source level with acoustic cavity structure is solved,and the source level with acoustic cavity structure is also simulated by ANSYS software.The results show that the two source level curves are basically the same,which verifies that the improved equivalent circuit is correct in predicting the source level of electrodynamic transducer.The effects of acoustic cavity structure size,end acoustic boundary and cavity gas acoustic parameters on the characteristics of source level are studied.The results show that laying the sound-absorbing material at the end of the acoustic cavity or filling the acoustic cavity with a gas with low characteristic impedance has a significant effect on suppressing or eliminating the fluctuation of source level. |
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