模量-近零声学超材料在空气或水下低频的完美吸收

IF 0.6 4区物理与天体物理 Q4 ACOUSTICS

Archives of Acoustics Pub Date : 2023-07-20 DOI:10.24425/aoa.2022.140729

F. N. Gaafer

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引用次数: 2

摘要

我们从理论上提出了一种通过改变狭缝宽度部分，将模量近零(MNZ)超材料浸入空气或水中来获得最佳吸波材料的方法。相消干涉为实现完全吸收(PA)铺平了道路。在理论分析的基础上，开发了一种支持与单极子(140 Hz)共振的声学超材料(AMMs)来构建低频吸声技术。通过对狭缝宽度的控制，可以达到完全吸收的效果。当结构中存在窄缝宽度和粘热损失时，观察到它们导致高吸收。利用COMSOL Multiphysics软件对阻抗管进行有限元模拟，分析了结构参数对两种介质的影响。结果在低频处非常吻合，达到最佳的完美吸收(99%)。这可能会支持amm在实际工程相关应用中减轻噪音，减缓声音捕获

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Perfect Absorption for Modulus-Near-Zero Acoustic Metamaterial in Air or Underwater at Low-Frequency

We theoretically propose a method to achieve an optimum absorbing material through a modulus-near-zero (MNZ) metamaterial immersed in air or water with a change in slit width part. The destructive interference has paved the way to achieve perfect absorption (PA). Depending upon theoretical analysis, an acoustic meta-material (AMMs) that supports resonance with a monopole (140 Hz) is developed to construct a low-frequency sound-absorbing technology. The dissipative loss eﬀect can be by attentively controlling onto slit width to achieve perfect absorption. When there are thin slit width and visco-thermal losses in the structure, it is observed that they lead to high absorption. We use ﬁnite element simulations via COMSOL Multiphysics software to theoretical measurement in impedance tube and show the inﬂuence of structural parameters in both me-diums. The results are of extraordinary correspondence at low frequency to achieve optimum perfect absorption (99%). That might support AMMs to actual engineering-related applications in the process of mitigating noise, slow sound trapping

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来源期刊

Archives of Acoustics 物理-声学

CiteScore

1.80

自引率

11.10%

发文量

审稿时长

6-12 weeks

期刊介绍： Archives of Acoustics, the peer-reviewed quarterly journal publishes original research papers from all areas of acoustics like: acoustical measurements and instrumentation, acoustics of musics, acousto-optics, architectural, building and environmental acoustics, bioacoustics, electroacoustics, linear and nonlinear acoustics, noise and vibration, physical and chemical effects of sound, physiological acoustics, psychoacoustics, quantum acoustics, speech processing and communication systems, speech production and perception, transducers, ultrasonics, underwater acoustics.