Meta-structure underwater transducer with low-frequency broadband efficient acoustic emission

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS Applied Acoustics Pub Date : 2025-03-30 Epub Date: 2025-02-22 DOI:10.1016/j.apacoust.2025.110622

Yunzhong Lei, Jiu Hui Wu, Shaokun Yang, Tengyue Zheng

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Abstract

It is difficult for traditional underwater acoustic emission transducers to possess low-frequency, broadband and high-efficiency characteristics simultaneously. In this paper, we propose a novel kind of meta-structure underwater transducer with its cover composed of a circular plate, ribs and additional mass units, and reveal the mechanisms of local resonance efficient acoustic emission and synergistic coupling broadband acoustic emission. The genetic algorithm (GA) is adopted to optimize the parameters of the meta-structure cover, and the low-frequency broadband efficient underwater acoustic emission with the sound pressure level (SPL) fluctuation of 6 dB in 100–2500 Hz is realized. Subsequently, the radial magnetic circuit is used as the driving device, and the prototype of the meta-structure underwater acoustic transducer is developed. The experimental results confirm the acoustic emission performance of the prototype, which is expected to show significant potential in long-range underwater acoustic communication.

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具有低频宽带高效声发射的元结构水下换能器

传统的水声发射换能器难以同时具备低频、宽带和高效的特性。本文提出了一种由圆板、肋和附加质量单元组成的新型元结构水下换能器，揭示了其局部共振、高效声发射和协同耦合宽带声发射的机理。采用遗传算法对元结构罩参数进行优化，实现了100-2500 Hz范围内声压级波动为6 dB的低频宽带高效水声发射。随后，采用径向磁路作为驱动装置，研制了元结构水声换能器样机。实验结果证实了原型机的声发射性能，有望在远程水声通信中显示出巨大的潜力。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.