Design and experimental analysis of active and passive dual sound absorption function structure based on dielectric elastomer film

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-07-11 DOI:10.1016/j.apacoust.2025.110939

Wenjian Kuang, Jinwu Wu, Zhicong Hu, Qibo Mao

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引用次数: 0

Abstract

Thin film acoustic metamaterials, which have great potential applications in the field of acoustics, have led to the study of various film-type sound-absorbing and sound-insulating structures as well as film-type speakers. Therefore, this paper proposes a dielectric loudspeaker based on dielectric elastomeric films, which can be used for passive noise control and as an active sound-absorbing and noise-reduction unit. For the passive sound absorption performance of dielectric speakers, the impedance and sound absorption coefficient of the structure are obtained through both the acoustic-electrical analog model and theoretical calculations. The resonant frequency of the dielectric speaker, which serves as an active noise reduction unit, is obtained through theoretical calculations. The passive sound absorption coefficient, frequency response curves, and coherence curves of the dielectric speaker were obtained through testing, and it was verified that it could be used as an active noise reduction unit. Theoretical and experimental results show that micro-perforation treatment can effectively enhance the sound absorption performance of dielectric speakers. The resonant frequency of dielectric speakers, as obtained through both theoretical calculations and experiments, is found to be relatively consistent. This study provides new design ideas for the application of thin-film acoustic structures in the field of noise reduction.

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基于介电弹性体膜的主动式和被动式双吸声功能结构设计与实验分析

薄膜声学超材料在声学领域具有巨大的应用潜力，导致了各种薄膜式吸声、隔声结构以及薄膜式扬声器的研究。因此，本文提出了一种基于介电弹性体薄膜的介质扬声器，它既可以用于被动噪声控制，也可以作为主动吸声降噪单元。对于介质扬声器的被动吸声性能，通过声电模拟模型和理论计算得到了结构的阻抗和吸声系数。通过理论计算得到了作为主动降噪单元的介质扬声器的谐振频率。通过测试得到了介质扬声器的被动吸声系数、频率响应曲线和相干曲线，验证了它可以作为主动降噪单元。理论和实验结果表明，微穿孔处理能有效提高介质扬声器的吸声性能。通过理论计算和实验，发现介质扬声器的谐振频率是比较一致的。本研究为薄膜声结构在降噪领域的应用提供了新的设计思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.