Three-Dimensional Soundproof Acoustic Metacage

Liu, Chenkai; Shi, Jinjie; Zhao, Wei; Zhou, Xiaoxi; Ma, Chu; Peng, Ru‐Wen; Wang, Mu; Hang, Zhi Hong; Liu, Xiaozhou; Christensen, Johan; Fang, Nicholas X.; Lai, Yun

doi:10.1103/physrevlett.127.084301

Cited by 58 publications

(13 citation statements)

References 47 publications

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“…While thinner structures we presented in literature, for instance in refs. [38,51,53], the thickness of the proposed structure might be decreased with some optimization, which however is out the scope of this work.…”

Section: Discussionmentioning

confidence: 99%

“…In this sense our goal is different from the development of ultra-thin structures presented in literature. [38,[51][52][53] Instead, we focus on the sparseness together with a number and width of stop-bands as these are the properties which are most desired for the mentioned applications. Under the sparseness we imply a low filling factor and large distance between the structural elements.…”

Section: Introductionmentioning

confidence: 99%

“…One of the important options enabled by metamaterials is the possibility to implement structures allowing air flow. [37][38][39][40][41] A variety of designs includes perforated membranes, [42,43] space coiling structures, [44][45][46][47][48] and metacages [49][50][51] have been presented. Nevertheless, despite the plethora of achievable physical effects, acoustic metamaterials rarely find real-life applications.…”

mentioning

confidence: 99%

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Metahouse: Noise‐Insulating Chamber Based on Periodic Structures

Krasikova

Krasikov

Melnikov

et al. 2022

Adv Materials Technologies

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Noise pollution remains a challenging problem requiring the development of novel systems for noise insulation. Extensive work in the field of acoustic metamaterials has led to various ventilated structures which, however, are usually demonstrated for rather narrow regions of the audible spectrum. In this work, the idea of metamaterial‐based systems is further extended, developing the concept of a metahouse chamber representing a ventilated structure for multiple band noise insulation. Broad stop‐bands originate from strong coupling between pairs of Helmholtz resonators constituting the structure. The averaged transmission −18.6 dB are demonstrated numerically and experimentally within the spectral range from 1500 to 16 500 Hz. The sparseness of the structure together with the possibility to use optically transparent materials suggest that the chamber may be also characterized by partial optical transparency depending on the mutual position of structural elements. The obtained results are promising for development of novel noise‐insulating structures advancing urban science.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Metahouse: Noise‐Insulating Chamber Based on Periodic Structures

Krasikova

Krasikov

Melnikov

et al. 2022

Adv Materials Technologies

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“…Man et al [ 18 ] proposed a space‐coiling fractal metamaterial, which shows multiple bandgaps in subwavelength scales depending on the fractal levels. Liu et al [ 19 ] proposed a 3D acoustic metamaterial composed of metamaterial slabs with open holes and space‐coiling structures, and they theoretically and experimentally demonstrated its soundproofing performance at the low‐frequency regime.…”

Section: Introductionmentioning

confidence: 99%

Labyrinthine Acoustic Metamaterials with a Subwavelength Bandgap Inspired by Topology‐Optimized Structural Design

et al. 2022

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Herein, a structural design for labyrinthine acoustic metamaterial is proposed using a topology optimization method to realize a subwavelength bandgap preventing the transmission of low‐frequency sounds. The optimized design is composed of air‐filled channels of different widths, which exhibit the subwavelength bandgap based on the monopole resonance induced in the meta‐atom. In addition to the optimized meta‐atom design, a simplified meta‐atom design with a small coiling coefficient is proposed by extracting structural features of the optimized design. The bandwidth and central frequency of the subwavelength bandgap can be controlled by adjusting the size parameters of the simplified meta‐atom. Numerical analysis for acoustic waves based on the finite‐element method is conducted to demonstrate the low transmission coefficients of the obtained designs for a wide‐ and low‐frequency range. Furthermore, using a 3D printer, experimental specimens of optimized and simplified meta‐atoms are constructed, and impedance tube experiments are performed to show their functionality.

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“…Studying acoustic resonators is essential both for many technological application and for fundamental research developing acoustic metamaterials with established properties [1][2][3][4], various opto-mechanical systems [5,6],topological insulators [7,8], and achieving bound states in the continuum [9,10]. One of the most important characteristics of any resonator is its eigenmode spectrum and their filed structure.…”

Section: Introductionmentioning

confidence: 99%

Acoustic resonators: symmetry classification and multipolar content of the eigenmodes

Tsimokha,

Igoshin,

Nikitina

et al. 2021

Preprint

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Acoustics recently became a versatile platform for discovering novel physical effects and concepts at a relatively simple technological level. On this way, single resonators and the structure of their resonant modes play a central role and define the properties of complex acoustic systems such as acoustic metamaterials, phononic crystals, and topological structures. In this paper, we present a powerful method allowing a qualitative analysis of eigenmodes of resonators in the linear monochromatic acoustic domain based on multipole classification of eigenmodes. Using the apparatus of group theory, we explain and predict the structure of the scattered field knowing only the symmetry group of the resonator by connecting the multipolar content of incident and scattered fields. Such an approach can be utilized for developing resonators with predesigned properties avoiding timeconsuming simulations. We have performed full multipole symmetry classification for a number of resonators geometries, and tightened it with scattering spectra profiles.

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Three-Dimensional Soundproof Acoustic Metacage

Cited by 58 publications

References 47 publications

Metahouse: Noise‐Insulating Chamber Based on Periodic Structures

Metahouse: Noise‐Insulating Chamber Based on Periodic Structures

Labyrinthine Acoustic Metamaterials with a Subwavelength Bandgap Inspired by Topology‐Optimized Structural Design

Acoustic resonators: symmetry classification and multipolar content of the eigenmodes

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