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Mei Z, Li X, Lyu Y, Sang J, Cheng X, Yang J. Broadband sound absorption based on impedance decoupling and modulation mechanisms. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2023; 154:3479-3486. [PMID: 38019095 DOI: 10.1121/10.0022513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 11/06/2023] [Indexed: 11/30/2023]
Abstract
In sound absorbers, acoustic resistance and reactance are usually coupled together and affect each other, which brings difficulties to impedance matching. An impedance decoupling method is proposed to make acoustic resistance and acoustic reactance vary independently. For the same thickness and perforation rate, acoustic reactance of the perforated panel with tube bundles (PPTBs) varies with the diameter of the tube, but acoustic resistance remains constant. Theoretical and simulated results show that a PPTB absorptive unit can exhibit resonance modes with varying damping states through impedance decoupling. It is found that through well-modulation, the PPTB unit in a slightly over-damped state cannot only maintain high sound absorption coefficients, but also expand the absorption peak bandwidth. Utilizing the mechanism of impedance decoupling, a broadband absorber is designed and evaluated by comprising the PPTB and microperforated panel (MPP). Measurement results indicate that it possesses an average absorption coefficient of 85% spanning more than a 3-octave bandwidth from 160 Hz to 1400 Hz with a deep sub-wavelength thickness. The impedance decoupling method helps to implement sound absorbers with highly efficient low-frequency broadband absorption.
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Affiliation(s)
- Zhongjian Mei
- Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Science, Beijing 100190, China
| | - Xiaodong Li
- Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Science, Beijing 100190, China
| | - Yadong Lyu
- Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Science, Beijing 100190, China
| | - Jinqiu Sang
- Shanghai Institute of AI for Education, East China Normal University, Shanghai 200062, China
| | - Xiaobin Cheng
- Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Science, Beijing 100190, China
| | - Jun Yang
- Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Science, Beijing 100190, China
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2
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Zhang M, Chen J, Chen M, Fan Z. Planar focusing lens for enhanced far-field ultrasonic imaging. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2022; 152:2711. [PMID: 36456303 DOI: 10.1121/10.0015055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 10/17/2022] [Indexed: 06/17/2023]
Abstract
This paper presents a far-field enhanced-resolution underwater ultrasonic imaging on the basis of a single-slit structured planar focusing lens. The iterative angular spectrum approach was employed to optimize the planar focusing lens from a designated focal pattern, characterized by focal length and full width at half maxima. Numerical simulations and experimental investigations were conducted on different target objects. Compared to the conventional method, both results showed that the performance of far-field ultrasonic imaging was comprehensively enhanced with the proposed planar focusing lens, in terms of resolving capability, working distance, operational bandwidth, and robustness. The single-slit structured planar focusing lens is cost effective and easy to fabricate, which would greatly benefit ultrasonic imaging and drive new applications of ultrasound in various scenarios.
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Affiliation(s)
- Mengru Zhang
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jian Chen
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Mu Chen
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zheng Fan
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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3
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Stein M, Keller S, Luo Y, Ilic O. Shaping contactless radiation forces through anomalous acoustic scattering. Nat Commun 2022; 13:6533. [PMID: 36319654 PMCID: PMC9626492 DOI: 10.1038/s41467-022-34207-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
Waves impart momentum and exert force on obstacles in their path. The transfer of wave momentum is a fundamental mechanism for contactless manipulation, yet the rules of conventional scattering intrinsically limit the radiation force based on the shape and the size of the manipulated object. Here, we show that this intrinsic limit can be broken for acoustic waves with subwavelength-structured surfaces (metasurfaces), where the force becomes controllable by the arrangement of surface features, independent of the object's overall shape and size. Harnessing such anomalous metasurface scattering, we demonstrate complex actuation phenomena: self-guidance, where a metasurface object is autonomously guided by an acoustic wave, and tractor beaming, where a metasurface object is pulled by the wave. Our results show that bringing the metasurface physics of acoustic waves, and its full arsenal of tools, to the domain of mechanical manipulation opens new frontiers in contactless actuation and enables diverse actuation mechanisms that are beyond the limits of traditional wave-matter interactions.
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Affiliation(s)
- Matthew Stein
- grid.17635.360000000419368657Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455 USA
| | - Sam Keller
- grid.17635.360000000419368657Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455 USA
| | - Yujie Luo
- grid.17635.360000000419368657Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455 USA
| | - Ognjen Ilic
- grid.17635.360000000419368657Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455 USA
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4
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Ammari H, Cao J. Unidirectional edge modes in time-modulated metamaterials. Proc Math Phys Eng Sci 2022. [DOI: 10.1098/rspa.2022.0395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We prove the possibility of achieving unidirectional edge modes in time-modulated supercell structures. Such finite structures consist of two trimers repeated periodically. Because of their symmetry, they admit degenerate edge eigenspaces. When the trimers are time-modulated with two opposite orientations, the degenerate eigenspace splits into two one-dimensional eigenspaces described by an analytical formula, each corresponding to a mode which is localized at one edge of the structure. Our results on the localization and stability of these edge modes with respect to fluctuations in the time-modulation amplitude are illustrated by several numerical simulations.
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Affiliation(s)
- Habib Ammari
- Department of Mathematics, ETH Zürich, Rämistrasse 101, Zurich CH-8092, Switzerland
| | - Jinghao Cao
- Department of Mathematics, ETH Zürich, Rämistrasse 101, Zurich CH-8092, Switzerland
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5
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Study on Band Gap and Sound Insulation Characteristics of an Adjustable Helmholtz Resonator. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12094512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To solve the problem of low-frequency noise in the environment, a Helmholtz-type phononic crystal with adjustable cavity structure and labyrinth tubes was designed. The unique design of the labyrinth tube greatly increases the length of the tube, improving low-frequency sound insulation performance, and the design of adjustable cavity structure realizes active regulation of the band structure. The band gap structure and sound insulation characteristics were analyzed by finite element method (FEM) and electro-mechanical-acoustic analogy method. The result shows that, firstly, the structure can generate two complete band gaps in the low-frequency range of 0–500 Hz, and there is a low-frequency band gap with lower limit of 40 Hz. Meanwhile, the structure has excellent sound insulation performance in the range of 0–500 Hz. Secondly, multiple resonant band gaps can be connected by adjusting the structural layout of the cavity through the telescopic screw, so as to achieve the purpose of widening the band gap and active control of environmental noise. Finally, in the periodic arrangement design of the structure, reducing the spacing between cells can effectively increase the bandwidth of band gaps. This design broadens the design idea of phononic crystal and provides a new method to solve the problem of low-frequency noise control.
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6
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Pirie H, Sadhuka S, Wang J, Andrei R, Hoffman JE. Topological Phononic Logic. PHYSICAL REVIEW LETTERS 2022; 128:015501. [PMID: 35061498 DOI: 10.1103/physrevlett.128.015501] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
Topological metamaterials have robust properties engineered from their macroscopic arrangement, rather than their microscopic constituency. They can be designed by starting from Dirac metamaterials with either symmetry-enforced or accidental degeneracy. The latter case provides greater flexibility in the design of topological switches, waveguides, and cloaking devices, because a large number of tuning parameters can be used to break the degeneracy and induce a topological phase. However, the design of a topological logic element-a switch that can be controlled by the output of a separate switch-remains elusive. Here we numerically demonstrate a topological logic gate for ultrasound by exploiting the large phase space of accidental degeneracies in a honeycomb lattice. We find that a degeneracy can be broken by six physical parameters, and we show how to tune these parameters to create a phononic switch that transitions between a topological waveguide and a trivial insulator by ultrasonic heating. Our design scheme is directly applicable to photonic crystals and may guide the design of future electronic topological transistors.
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Affiliation(s)
- Harris Pirie
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Shuvom Sadhuka
- School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Jennifer Wang
- School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA
- Department of Physics, Wellesley College, Wellesley, Massachusetts 02481, USA
| | - Radu Andrei
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Jennifer E Hoffman
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
- School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA
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7
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Chang L, Jiang A, Rao M, Ma F, Huang H, Zhu Z, Zhang Y, Wu Y, Li B, Hu Y. Progress of low-frequency sound absorption research utilizing intelligent materials and acoustic metamaterials. RSC Adv 2021; 11:37784-37800. [PMID: 35498066 PMCID: PMC9044041 DOI: 10.1039/d1ra06493b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 11/04/2021] [Indexed: 01/22/2023] Open
Abstract
In recent years, increasing attention has been paid to the impacts of environmental noises on living creatures as well as the accuracy and stability of precise instruments. Due to inherent properties induced by large wavelength, the attenuation and manipulation of low-frequency sound waves is quite difficult to realize with traditional acoustic absorbers, yet particularly critical to modern designs. The advent of acoustic metamaterials and intelligent materials provides possibilities of energy dissipation mechanisms other than viscous dissipation and heat conduction in conventional porous sound absorbers, and therefore inspires new strategies on the design of subwavelength-scale structures. This short review aims to trace the current advancement on the low-frequency sound absorption research utilizing intelligent materials and metamaterials, including Helmholtz resonators and acoustic metamaterials based on micro-perforated plates, porous media, and decorated membrane, along with the tunable absorbing structures regulated with the function of electroactive polymers or magnetically sensitive materials. The effective principles and prospects were concluded and presented for future investigations of subwavelength-scale acoustic structures.
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Affiliation(s)
- Longfei Chang
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Hefei University of Technology Hefei 230009 China
- Anhui Province Key Lab of Advanced Functional Materials and Devices, Hefei University of Technology Hefei 230009 China
| | - Ajuan Jiang
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Hefei University of Technology Hefei 230009 China
| | - Manting Rao
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Hefei University of Technology Hefei 230009 China
| | - Fuyin Ma
- State Key Laboratory for Manufacturing Engineering System, Shanxi Province Key Laboratory for Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University Xi'an 710049 China
| | - Haibo Huang
- School of Mechanical Engineering, Southwest Jiaotong University 610031 Cheng Du Sichuan China
| | - Zicai Zhu
- State Key Laboratory for Manufacturing Engineering System, Shanxi Province Key Laboratory for Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University Xi'an 710049 China
| | - Yu Zhang
- State Key Laboratory for Manufacturing Engineering System, Shanxi Province Key Laboratory for Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University Xi'an 710049 China
| | - Yucheng Wu
- Anhui Province Key Lab of Advanced Functional Materials and Devices, Hefei University of Technology Hefei 230009 China
| | - Bo Li
- State Key Laboratory for Manufacturing Engineering System, Shanxi Province Key Laboratory for Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University Xi'an 710049 China
| | - Ying Hu
- Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Hefei University of Technology Hefei 230009 China
- Anhui Province Key Lab of Advanced Functional Materials and Devices, Hefei University of Technology Hefei 230009 China
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8
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Tang X, Liang S, Jiang Y, Gao C, Huang Y, Zhang Y, Xue C, Wen W. Magnetoactive acoustic metamaterials based on nanoparticle-enhanced diaphragm. Sci Rep 2021; 11:22162. [PMID: 34772992 PMCID: PMC8589973 DOI: 10.1038/s41598-021-01569-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 10/19/2021] [Indexed: 11/26/2022] Open
Abstract
Magnetoactive membrane-type acoustic metamaterials are fabricated by coating a layer of magnetic nanoparticles on the polyethylene (PE) membranes and their vibration characters are investigated experimentally. From our experiments, we discovered that, under different magnetic fields by varying the distance between a magnet and the membranes, such membranes exhibit tunable vibration eigenfrequencies (the shift towards lower frequencies), which is caused by the variation of the effective mass density and effective tension coefficient resulted from the second derivative of the magnetic field. The strong magnetic force between the layer of magnetic nanoparticles and the magnet enhances the eigenfrequency shift. A spring oscillator model is proposed and it agrees well with the experimental results. We also experimentally observed that the vibration radius, effective mass density, and effective tension coefficient of the membranes can enormously affect the eigenfrequencies of the membranes. We believe that this type of metamaterials may open up some potential applications for acoustic devices with turntable vibration properties.
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Affiliation(s)
- Xingwei Tang
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Shanjun Liang
- Division of Science, Engineering and Health Studies, College of Professional and Continuing Education, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, SAR, China
| | - Yusheng Jiang
- College of Communication Engineering, Chongqing University, Chongqing, 400044, China
| | - Cong Gao
- Advanced Materials Thrust, The Hong Kong University of Science and Technology, Guangzhou, Guangdong, China
| | - Yujin Huang
- Shenzhen Fantwave Tech. Co., Ltd, Shenzhen, 518110, China
| | - Yuan Zhang
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Chang Xue
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Weijia Wen
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
- Advanced Materials Thrust, The Hong Kong University of Science and Technology, Guangzhou, Guangdong, China.
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian, Shenzhen, China.
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9
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Bakaric M, Miloro P, Javaherian A, Cox BT, Treeby BE, Brown MD. Measurement of the ultrasound attenuation and dispersion in 3D-printed photopolymer materials from 1 to 3.5 MHz. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2021; 150:2798. [PMID: 34717448 DOI: 10.1121/10.0006668] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
Over the past decade, the range of applications in biomedical ultrasound exploiting 3D printing has rapidly expanded. For wavefront shaping specifically, 3D printing has enabled a diverse range of new, low-cost approaches for controlling acoustic fields. These methods rely on accurate knowledge of the bulk acoustic properties of the materials; however, to date, robust knowledge of these parameters is lacking for many materials that are commonly used. In this work, the acoustic properties of eight 3D-printed photopolymer materials were characterised over a frequency range from 1 to 3.5 MHz. The properties measured were the frequency-dependent phase velocity and attenuation, group velocity, signal velocity, and mass density. The materials were fabricated using two separate techniques [PolyJet and stereolithograph (SLA)], and included Agilus30, FLXA9960, FLXA9995, Formlabs Clear, RGDA8625, RGDA8630, VeroClear, and VeroWhite. The range of measured density values across all eight materials was 1120-1180 kg · m-3, while the sound speed values were between 2020 to 2630 m · s-1, and attenuation values typically in the range 3-9 dB · MHz-1· cm-1.
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Affiliation(s)
- Marina Bakaric
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Piero Miloro
- Ultrasound and Underwater Acoustics, National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Ashkan Javaherian
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Ben T Cox
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Bradley E Treeby
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Michael D Brown
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, United Kingdom
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10
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Zhou Z, Huang S, Li D, Zhu J, Li Y. Broadband impedance modulation via non-local acoustic metamaterials. Natl Sci Rev 2021; 9:nwab171. [PMID: 36072507 PMCID: PMC9440717 DOI: 10.1093/nsr/nwab171] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 09/04/2021] [Accepted: 09/05/2021] [Indexed: 11/13/2022] Open
Abstract
Causality of linear time-invariant systems inherently defines the wave-matter interaction process in wave physics. This principle imposes strict constraints on the interfacial response of materials on various physical platforms. A typical consequence is that a delicate balance has to be struck between the conflicting bandwidth and geometric thickness when constructing a medium with desired impedance, which makes it challenging to realize broadband impedance modulation with compact structures. In pursuit of improvement, the over-damped recipe and the reduced excessive response recipe are creatively presented in this work. As a proof-of-concept demonstration, we construct a metamaterial with intensive mode density that supports strong non-locality over a frequency band from 320 Hz to 6400 Hz. Under the guidelines of the over-damped recipe and the reduced excessive response recipe, the metamaterial realizes impedance matching to air and exhibits broadband near-perfect absorption without evident impedance oscillation and absorption dips in the working frequency band. We further present a dual-functional design capable of frequency-selective absorption and reflection by concentrating the resonance modes in three frequency bands. Our research reveals the significance of over-damped recipe and the strong non-local effect in broadband impedance modulation, which may open up avenues for constructing efficient artificial impedance boundaries for energy absorption and other wave manipulation.
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Affiliation(s)
- Zhiling Zhou
- Institute of Acoustics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Sibo Huang
- Institute of Acoustics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Dongting Li
- Institute of Acoustics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Jie Zhu
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
| | - Yong Li
- Institute of Acoustics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
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11
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Liu C, Shi J, Zhao W, Zhou X, Ma C, Peng R, Wang M, Hang ZH, Liu X, Christensen J, Fang NX, Lai Y. Three-Dimensional Soundproof Acoustic Metacage. PHYSICAL REVIEW LETTERS 2021; 127:084301. [PMID: 34477409 DOI: 10.1103/physrevlett.127.084301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 09/30/2020] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
In this Letter, we theoretically propose and experimentally demonstrate a three-dimensional soundproof acoustic cage structure, hereby denoted as an acoustic metacage. The metacage is composed of six acoustic metamaterial slabs with open holes and hidden bypass space coiling tunnels connected to the holes. Band structure analysis reveals a novel physical mechanism to open a low-frequency broad partial band gap via the band folding in other directions, which can also be interpreted by an effective medium with indefinite effective mass density and negative effective modulus. Transmission loss in simulations and in the acoustic impedance tube are administered. Strikingly, we prove that the soundproofing effect of the metacage is robust against the airflow perturbation induced by a fan. Our work paves a road for low-frequency airborne soundproof structures in the presence of ventilation.
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Affiliation(s)
- Chenkai Liu
- MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - Jinjie Shi
- MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Wei Zhao
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- School of Electronic and Information Engineering, Soochow University, Suzhou 215006, China
| | - Xiaoxi Zhou
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - Chu Ma
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Ruwen Peng
- MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Mu Wang
- MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Zhi Hong Hang
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- Institute for Advanced Study, Soochow University, Suzhou 215006, China
| | - Xiaozhou Liu
- MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Johan Christensen
- Department of Physics, Universidad Carlos III de Madrid, ES-28916 Leganes, Madrid, Spain
| | - Nicholas X Fang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Yun Lai
- MOE Key Laboratory of Modern Acoustics, National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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12
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Research Progress and Development Trends of Acoustic Metamaterials. Molecules 2021; 26:molecules26134018. [PMID: 34209353 PMCID: PMC8271960 DOI: 10.3390/molecules26134018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/11/2021] [Accepted: 06/17/2021] [Indexed: 11/21/2022] Open
Abstract
Acoustic metamaterials are materials with artificially designed structures, which have characteristics that surpass the behavior of natural materials, such as negative refraction, anomalous Doppler effect, plane focusing, etc. This article mainly introduces and summarizes the related research progress of acoustic metamaterials in the past two decades, focusing on meta-atomic acoustic metamaterials, metamolecular acoustic metamaterials, meta-atomic clusters and metamolecule cluster acoustic metamaterials. Finally, the research overview and development trend of acoustic metasurfaces are briefly introduced.
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13
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Du J, Luo Y, Zhao X, Sun X, Song Y, Hu X. Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth. Sci Rep 2021; 11:5829. [PMID: 33712683 PMCID: PMC7955050 DOI: 10.1038/s41598-021-84986-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 02/23/2021] [Indexed: 11/09/2022] Open
Abstract
The recent advent of acoustic metamaterials offers unprecedented opportunities for sound controlling in various occasions, whereas it remains a challenge to attain broadband high sound absorption and free air flow simultaneously. Here, we demonstrated, both theoretically and experimentally, that this problem can be overcome by using a bilayer ventilated labyrinthine metasurface. By altering the spacing between two constituent single-layer metasurfaces and adopting asymmetric losses in them, near-perfect (98.6%) absorption is achieved at resonant frequency for sound waves incident from the front. The relative bandwidth of absorption peak can be tuned in a wide range (from 12% to 80%) by adjusting the open area ratio of the structure. For sound waves from the back, the bilayer metasurface still serves as a sound barrier with low transmission. Our results present a strategy to realize high sound absorption and free air flow simultaneously, and could find applications in building acoustics and noise remediation.
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Affiliation(s)
- Jiayuan Du
- Department of Materials Science, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China
| | - Yuezhou Luo
- Department of Materials Science, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China
| | - Xinyu Zhao
- Department of Materials Science, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China
| | - Xiaodong Sun
- Department of Materials Science, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China
| | - Yanan Song
- Department of Materials Science, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China
| | - Xinhua Hu
- Department of Materials Science, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China.
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14
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Cushing CW, Wilson PS, Haberman MR, Shen C, Li J, Cummer SA, Tan ZJ, Ma C, Du H, Fang NX. Characterization of an underwater metamaterial made of aluminum honeycomb panels at low frequencies. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2021; 149:1829. [PMID: 33765814 DOI: 10.1121/10.0003629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 02/15/2021] [Indexed: 06/12/2023]
Abstract
This paper presents a method to characterize the effective properties of inertial acoustic metamaterial unit cells for underwater operation. The method is manifested by a fast and reliable parameter retrieval procedure utilizing both numerical simulations and measurements. The effectiveness of the method was proved to be self-consistent by a metamaterial unit cell composed of aluminum honeycomb panels with soft rubber spacers. Simulated results agree well with the measured responses of this metamaterial in a water-filled resonator tube. A sub-unity density ratio and an anisotropic mass density are simultaneously achieved by the metamaterial unit cell, making it useful in implementations of transformation acoustics. The metamaterial, together with the approach for its characterization, are expected to be useful for underwater acoustic devices.
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Affiliation(s)
- Colby W Cushing
- Applied Research Laboratories and Walker Department of Mechanical Engineering, University of Texas, Austin, Texas 78713-8029, USA
| | - Preston S Wilson
- Applied Research Laboratories and Walker Department of Mechanical Engineering, University of Texas, Austin, Texas 78713-8029, USA
| | - Michael R Haberman
- Applied Research Laboratories and Walker Department of Mechanical Engineering, University of Texas, Austin, Texas 78713-8029, USA
| | - Chen Shen
- Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Junfei Li
- Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Steven A Cummer
- Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Zheng Jie Tan
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Chu Ma
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Huifeng Du
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Nicholas X Fang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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15
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Wormser M, Kiefer DA, Rupitsch SJ, Körner C. Comparison of Transmission Measurement Methods of Elastic Waves in Phononic Band Gap Materials. MATERIALS 2021; 14:ma14051133. [PMID: 33670843 PMCID: PMC7957478 DOI: 10.3390/ma14051133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/03/2021] [Accepted: 02/23/2021] [Indexed: 12/05/2022]
Abstract
Periodic cellular structures can exhibit metamaterial properties, such as phononic band gaps. In order to detect these frequency bands of strong wave attenuation experimentally, several devices for wave excitation and measurement can be applied. In this work, piezoelectric transducers are utilized to excite two additively manufactured three-dimensional cellular structures. For the measurement of the transmission factor, we compare two methods. First, the transmitted waves are measured with the same kind of piezoelectric transducer. Second, a laser Doppler vibrometer is employed to scan the mechanical vibrations of the sample on both the emitting and receiving surfaces. The additional comparison of two different methods of spatial averaging of the vibrometer data, that is, the quadratic mean and arithmetic mean, provides insight into the way the piezoelectric transducers convert the transmitted signal. Experimental results are supported by numerical simulations of the dispersion relation and a simplified transmission simulation.
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Affiliation(s)
- Maximilian Wormser
- Materials Science and Technology for Metals, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany;
- Joint Institute of Advanced Materials and Processes, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 90762 Fürth, Germany
- Correspondence:
| | - Daniel A. Kiefer
- Sensor Technology, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (D.A.K.); (S.J.R.)
| | - Stefan J. Rupitsch
- Sensor Technology, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (D.A.K.); (S.J.R.)
- Laboratory for Electrical Instrumentation and Embedded Systems, Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg, Germany
| | - Carolin Körner
- Materials Science and Technology for Metals, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany;
- Joint Institute of Advanced Materials and Processes, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 90762 Fürth, Germany
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16
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Liu F, Wang Z, Ke M, Liu Z. Metafluids beyond the Bulk Modulus. PHYSICAL REVIEW LETTERS 2020; 125:185502. [PMID: 33196270 DOI: 10.1103/physrevlett.125.185502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 10/07/2020] [Indexed: 06/11/2023]
Abstract
It is well known that the acoustic properties of fluid are characterized by mass density and bulk modulus. Metafluids, the fluid metamaterials, generalize the natural fluid, which can accommodate extreme and/or negative values of these two parameters. Here, we further show that the metafluids, composed of periodic thin-walled hollow cylinders immersed in fluid, can provide not only the designable effective mass density and bulk modulus, but also a completely new effective parameter, which appears in the wave velocities as a role similar to the shear modulus of solid. The new effective parameter, describing the response of the fluid to the quadrupolar component of waves, is obtained by generalizing the effective medium theory (EMT) to include the second-order effects, which is vanishing and neglected in the conventional EMT, but giant here in the metafluids with built-in quadrupolar resonances. With the discovery of the metafluids of shearlike moduli, our Letter extends the concept of metafluids and will have a great significance in the field of metamaterials.
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Affiliation(s)
- Fengming Liu
- School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China
| | - Ziyu Wang
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Manzhu Ke
- Key Laboratory of Artificial Micro- and Nanostructures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Zhengyou Liu
- Key Laboratory of Artificial Micro- and Nanostructures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
- Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
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17
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Dong E, Song Z, Zhang Y, Ghaffari Mosanenzadeh S, He Q, Zhao X, Fang NX. Bioinspired metagel with broadband tunable impedance matching. SCIENCE ADVANCES 2020; 6:eabb3641. [PMID: 33127672 PMCID: PMC7608802 DOI: 10.1126/sciadv.abb3641] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 09/16/2020] [Indexed: 06/01/2023]
Abstract
To maximize energy transmission from a source through a media, the concept of impedance matching has been established in electrical, acoustic, and optical engineering. However, existing design of acoustic impedance matching, which extends exactly by a quarter wavelength, sets a fundamental limit of narrowband transmission. Here, we report a previously unknown class of bioinspired metagel impedance transformers to overcome this limit. The transformer embeds a two-dimensional metamaterial matrix of steel cylinders into hydrogel. Using experimental data of the biosonar from the Indo-Pacific humpback dolphin, we demonstrate through theoretical analysis that broadband transmission is achieved when the bioinspired acoustic impedance function is introduced. Furthermore, we experimentally show that the metagel device offers efficient implementation in broadband underwater ultrasound detection with the benefit of being soft and tunable. The bioinspired two-dimensional metagel breaks the length-wavelength dependence, which paves a previously unexplored way for designing next-generation broadband impedance matching devices in diverse wave engineering.
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Affiliation(s)
- Erqian Dong
- Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Zhongchang Song
- Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Yu Zhang
- Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China.
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | | | - Qi He
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xuanhe Zhao
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Nicholas X Fang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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18
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Gu Z, Gao H, Liu T, Li Y, Zhu J. Dopant-modulated sound transmission with zero index acoustic metamaterials. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2020; 148:1636. [PMID: 33003853 DOI: 10.1121/10.0001962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
Zero index metamaterials have shown the ability to achieve total transmission or reflection by embedding particular defects with various effective parameters. Here, we present that tunable sound transmission can be realized by configuring a subwavelength-sized dopant inside zero index acoustic metamaterials. Despite its small spatial signature, the dopant is able to strongly interact with the acoustic waves inside the whole zero index metamaterials. It is due to the essence of the zero effective index that can homogenize the pressure field within the metamaterials. Sound transmission can thus be fully switched on and off by adjusting the dopant's surface impedance. A simple rectangular cavity with varied lengths is proposed to provide the required impedance boundary. Our model of correlating the dopant design with sound transmission performance is validated theoretically and numerically. We further demonstrate the utilization of the proposed design to effectively modulate the sound focusing effect. Such a dopant-modulated sound transmission scheme, with its simplicity and capability, has potential applications in fields like noise control and ultrasonography.
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Affiliation(s)
- Zhongming Gu
- The Hong Kong Polytechnic University Shenzhen Research Institute, 18 Yuexing First Avenue, Shenzhen 518057, People's Republic of China
| | - He Gao
- The Hong Kong Polytechnic University Shenzhen Research Institute, 18 Yuexing First Avenue, Shenzhen 518057, People's Republic of China
| | - Tuo Liu
- The Hong Kong Polytechnic University Shenzhen Research Institute, 18 Yuexing First Avenue, Shenzhen 518057, People's Republic of China
| | - Yong Li
- Institute of Acoustics, Tongji University, 1239 Siping Road, Shanghai 200092, People's Republic of China
| | - Jie Zhu
- The Hong Kong Polytechnic University Shenzhen Research Institute, 18 Yuexing First Avenue, Shenzhen 518057, People's Republic of China
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19
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Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances. CRYSTALS 2020. [DOI: 10.3390/cryst10080686] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical characteristics that paved a new pathway for researchers to develop effective solutions for a wide variety of multifunctional applications, such as low-frequency sound attenuation, sound wave manipulation, energy harvesting, acoustic focusing, acoustic cloaking, biomedical acoustics, and topological acoustics. This review provides an update on the acoustic metamaterials’ recent progress for simultaneous sound attenuation and air ventilation performances. Several variants of acoustic metamaterials, such as locally resonant structures, space-coiling, holey and labyrinthine metamaterials, and Fano resonant materials, are discussed briefly. Finally, the current challenges and future outlook in this emerging field are discussed as well.
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20
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Jiang T, Li C, He Q, Peng ZK. Randomized resonant metamaterials for single-sensor identification of elastic vibrations. Nat Commun 2020; 11:2353. [PMID: 32393741 PMCID: PMC7214442 DOI: 10.1038/s41467-020-15950-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 04/03/2020] [Indexed: 11/25/2022] Open
Abstract
Vibrations carry a wealth of useful physical information in various fields. Identifying the multi-source vibration information generally requires a large number of sensors and complex hardware. Compressive sensing has been shown to be able to bypass the traditional sensing requirements by encoding spatial physical fields, but how to encode vibration information remains unexplored. Here we propose a randomized resonant metamaterial with randomly coupled local resonators for single-sensor compressed identification of elastic vibrations. The disordered effective masses of local resonators lead to highly uncorrelated vibration transmissions, and the spatial vibration information can thus be physically encoded. We demonstrate that the spatial vibration information can be reconstructed via a compressive sensing framework, and this metamaterial can be reconfigured while maintaining desirable performance. This randomized resonant metamaterial presents a new perspective for single-sensor vibration sensing via vibration transmission encoding, and potentially offers an approach to simpler sensing devices for many other physical information. Designing efficient and flexible metamaterial with uncorrelated transmissions for spatial vibration encoding and identification remains a challenge. Here, the authors propose a randomized resonant metamaterial with randomly coupled local resonators for single-sensor identification of elastic vibrations.
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Affiliation(s)
- Tianxi Jiang
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 200240, Shanghai, People's Republic of China
| | - Chong Li
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 200240, Shanghai, People's Republic of China
| | - Qingbo He
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 200240, Shanghai, People's Republic of China.
| | - Zhi-Ke Peng
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 200240, Shanghai, People's Republic of China
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21
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Long Y, Ren J, Chen H. Unsupervised Manifold Clustering of Topological Phononics. PHYSICAL REVIEW LETTERS 2020; 124:185501. [PMID: 32441973 DOI: 10.1103/physrevlett.124.185501] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
Classification of topological phononics is challenging due to the lack of universal topological invariants and the randomness of structure patterns. Here, we show the unsupervised manifold learning for clustering topological phononics without any a priori knowledge, neither topological invariants nor supervised trainings, even when systems are imperfect or disordered. This is achieved by exploiting the real-space projection operator about finite phononic lattices to describe the correlation between oscillators. We exemplify the efficient unsupervised manifold clustering in typical phononic systems, including a one-dimensional Su-Schrieffer-Heeger-type phononic chain with random couplings, amorphous phononic topological insulators, higher-order phononic topological states, and a non-Hermitian phononic chain with random dissipations. The results would inspire more efforts on applications of unsupervised machine learning for topological phononic devices and beyond.
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Affiliation(s)
- Yang Long
- Center for Phononics and Thermal Energy Science, China-EU Joint Center for Nanophononics, Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China
| | - Jie Ren
- Center for Phononics and Thermal Energy Science, China-EU Joint Center for Nanophononics, Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China
| | - Hong Chen
- Center for Phononics and Thermal Energy Science, China-EU Joint Center for Nanophononics, Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China
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22
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Zhang X, Qu Z, Wang H. Engineering Acoustic Metamaterials for Sound Absorption: From Uniform to Gradient Structures. iScience 2020; 23:101110. [PMID: 32408175 PMCID: PMC7225741 DOI: 10.1016/j.isci.2020.101110] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 04/03/2020] [Accepted: 04/23/2020] [Indexed: 11/30/2022] Open
Abstract
The traditional sound absorption problem has not been completely resolved over the last 200 years. At every stage, its research has changed depending on practical requirements and current technologies. Phononic crystals (PCs) and acoustic metamaterials (AMs) have gained attention because of their extensive investigation and development over the past 30 years. Especially, the use of these materials brings new vitality into the traditional sound absorption problem to figure out broad working band and low-frequency absorption. This review highlights recent progress in sound absorption—from airborne to waterborne absorption—and gradient-index AMs. Progress in gradient-index AMs is singled out because of their favorable impedance matching, good viscous and thermal dissipation, and lengthened propagation paths compared with those of other materials. The progress in sound absorption of PCs and AMs is promising to serve as the next-generation sound absorbing materials, trap and reuse acoustic energy, and attenuate earthquake/tsunami wave in the future.
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Affiliation(s)
- Xiuhai Zhang
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Zhiguo Qu
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China.
| | - Hui Wang
- School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, P.R. China
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23
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Abstract
As a new kind of artificial material developed in recent decades, metamaterials exhibit novel performance and the promising application potentials in the field of practical engineering compared with the natural materials. Acoustic metamaterials and phononic crystals have some extraordinary physical properties, effective negative parameters, band gaps, negative refraction, etc., extending the acoustic properties of existing materials. The special physical properties have attracted the attention of researchers, and great progress has been made in engineering applications. This article summarizes the research on acoustic metamaterials and phononic crystals in recent decades, briefly introduces some representative studies, including equivalent acoustic parameters and extraordinary characteristics of metamaterials, explains acoustic metamaterial design methods, and summarizes the technical bottlenecks and application prospects.
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24
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Chen H, Ding C. Simulated and Experimental Research of Multi-Band Acoustic Metamaterial with a Single Resonant Structure. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3469. [PMID: 31652700 PMCID: PMC6862553 DOI: 10.3390/ma12213469] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 10/17/2019] [Accepted: 10/19/2019] [Indexed: 11/16/2022]
Abstract
We present a multi-band acoustic metamaterial (AMM) with a single structural unit of a nested split hollow sphere (NSHS). The transmissions of the NSHS-AMM from the simulation and experiment revealed two dips which were attributed to local coupling resonance. Using the retrieval method from the experimental data, we calculated the effective modulus of the NSHS-AMM and found it to be negative near the bands of the two dips. The AMM with a negative modulus can be easily tuned due to the coupling effect in the NSHS. The two dips can be simultaneously tuned by changing the diameter and the direction angle of the split holes of the interior and exterior split hollow sphere (SHS) in the NSHS. We designed a three-nested SHS-AMM with a negative modulus in three bands. Given the obvious local coupling resonance in the NSHS, such NSHS-AMMs may provide a viable path for the design of broadband AMMs or acoustic metasurfaces.
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Affiliation(s)
- Huaijun Chen
- College of Physics and Electronic Information Engineering, Engineering Research Center of Nanostructure and Functional Materials, Ningxia Normal University, Guyuan 756000, China.
| | - Changlin Ding
- Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China.
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25
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Dong E, Zhang Y, Song Z, Zhang T, Cai C, Fang NX. Physical modeling and validation of porpoises' directional emission via hybrid metamaterials. Natl Sci Rev 2019; 6:921-928. [PMID: 34691953 PMCID: PMC8291406 DOI: 10.1093/nsr/nwz085] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 06/02/2019] [Accepted: 06/02/2019] [Indexed: 11/14/2022] Open
Abstract
In wave physics and engineering, directional emission sets a fundamental limitation on conventional simple sources as their sizes should be sufficiently larger than their wavelength. Artificial metamaterial and animal biosonar both show potential in overcoming this limitation. Existing metamaterials arranged in periodic microstructures face great challenges in realizing complex and multiphase biosonar structures. Here, we proposed a physical directional emission model to bridge the gap between porpoises' biosonar and artificial metamaterial. Inspired by the anatomical and physical properties of the porpoise's biosonar transmission system, we fabricated a hybrid metamaterial system composed of multiple composite structures. We validated that the hybrid metamaterial significantly increased directivity and main lobe energy over a broad bandwidth both numerically and experimentally. The device displayed efficiency in detecting underwater target and suppressing false target jamming. The metamaterial-based physical model may be helpful to achieve the physical mechanisms of porpoise biosonar detection and has diverse applications in underwater acoustic sensing, ultrasound scanning, and medical ultrasonography.
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Affiliation(s)
- Erqian Dong
- Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Yu Zhang
- Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China.,Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.,State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China
| | - Zhongchang Song
- Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China.,Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | | | - Chen Cai
- Wuhan Second Ship Design and Research Institute, Wuhan 430064, China
| | - Nicholas X Fang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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26
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The Present and Future Role of Acoustic Metamaterials for Architectural and Urban Noise Mitigations. ACOUSTICS 2019. [DOI: 10.3390/acoustics1030035] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Owing to a steep rise in urban population, there has been a continuous growth in construction of buildings, public or private transport like cars, motorbikes, trains, and planes at a global level. Hence, urban noise has become a major issue affecting the health and quality of human life. In the current environmental scenario, architectural acoustics has been directed towards controlling and manipulating sound waves at a desired level. Structural engineers and designers are moving towards green technologies, which may help improve the overall comfort level of residents. A variety of conventional sound absorbing materials are being used to reduce noise, but attenuation of low-frequency noise still remains a challenge. Recently, acoustic metamaterials that enable low-frequency sound manipulation, mitigation, and control have been widely used for architectural acoustics and traffic noise mitigation. This review article provides an overview of the role of acoustic metamaterials for architectural acoustics and road noise mitigation applications. The current challenges and prominent future directions in the field are also highlighted.
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27
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Tian Z, Shen C, Li J, Reit E, Gu Y, Fu H, Cummer SA, Huang TJ. Programmable Acoustic Metasurfaces. ADVANCED FUNCTIONAL MATERIALS 2019; 29:1808489. [PMID: 31123431 PMCID: PMC6527353 DOI: 10.1002/adfm.201808489] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Indexed: 05/12/2023]
Abstract
Metasurfaces open up unprecedented potential for wave engineering using subwavelength sheets. However, a severe limitation of current acoustic metasurfaces is their poor reconfigurability to achieve distinct functions on demand. Here a programmable acoustic metasurface that contains an array of tunable subwavelength unit cells to break the limitation and realize versatile two-dimensional wave manipulation functions is reported. Each unit cell of the metasurface is composed of a straight channel and five shunted Helmholtz resonators, whose effective mass can be tuned by a robust fluidic system. The phase and amplitude of acoustic waves transmitting through each unit cell can be modulated dynamically and continuously. Based on such mechanism, the metasurface is able to achieve versatile wave manipulation functions, by engineering the phase and amplitude of transmission waves in the subwavelength scale. Through acoustic field scanning experiments, multiple wave manipulation functions, including steering acoustic waves, engineering acoustic beams, and switching on/off acoustic energy flow by using one design of metasurface are visually demonstrated. This work extends the metasurface research and holds great potential for a wide range of applications including acoustic imaging, communication, levitation, and tweezers.
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Affiliation(s)
- Zhenhua Tian
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Chen Shen
- Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA
| | - Junfei Li
- Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA
| | - Eric Reit
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Yuyang Gu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Hai Fu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Steven A Cummer
- Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA
| | - Tony Jun Huang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
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28
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Yuan M, Cao Z, Luo J, Chou X. Recent Developments of Acoustic Energy Harvesting: A Review. MICROMACHINES 2019; 10:mi10010048. [PMID: 30641876 PMCID: PMC6357068 DOI: 10.3390/mi10010048] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/03/2019] [Accepted: 01/07/2019] [Indexed: 11/25/2022]
Abstract
Acoustic energy is a type of environmental energy source that can be scavenged and converted into electrical energy for small-scale power applications. In general, incident sound power density is low and structural design for acoustic energy harvesting (AEH) is crucial. This review article summarizes the mechanisms of AEH, which include the Helmholtz resonator approach, the quarter-wavelength resonator approach, and the acoustic metamaterial approach. The details of recently proposed AEH devices and mechanisms are carefully reviewed and compared. Because acoustic metamaterials have the advantages of compactness, effectiveness, and flexibility, it is suggested that the emerging metamaterial-based AEH technique is highly suitable for further development. It is demonstrated that the AEH technique will become an essential part of the environmental energy-harvesting research field. As a multidisciplinary research topic, the major challenge is to integrate AEH devices into engineering structures and make composite structures smarter to achieve large-scale AEH.
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Affiliation(s)
- Ming Yuan
- School of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
| | - Ziping Cao
- School of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
| | - Jun Luo
- School of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
| | - Xiujian Chou
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China.
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