1
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Ou Y, Zhao Y. On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurface. Sci Rep 2023; 13:22184. [PMID: 38092849 PMCID: PMC10719350 DOI: 10.1038/s41598-023-49592-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 12/09/2023] [Indexed: 12/17/2023] Open
Abstract
This work proposes a noise-reduction structure that integrates phase-modulating metasurface (PMM) with acoustic liners (ALs) to enhance the narrow band absorption performance of a duct with relatively small length-diameter ratio. The PMM manipulates the wavefront by introducing different transmission phase shifts based on an array of Helmholtz resonators, so that the spinning wave within the duct can be generated. Compared with the plane wave, the generated spinning wave has a lower group velocity, which results in a greater traveling distance over the ALs in the duct. The optimization design is performed to determine the final structural parameters of the PMM, which is based on the predictions of the amplitude and phase shift of the acoustic wave at the outlet of the PMM using the theory of passive phased array. With the manipulation of the PMM, the incident plane wave is modulated into a spinning wave, and then enters into the acoustic liner duct (ALD), whose structural parameters are optimized by maximizing the transmission loss using the mode-matching technique. Finally, the noise-reduction performance of this combined structure is evaluated by numerical simulations in the presence of grazing flow. The results demonstrate that, compared with the traditional ALD, the proposed structure exhibits a significant increase in transmission loss within the considered frequency band, especially near the peak frequency of the narrow band noise.
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Affiliation(s)
- Yang Ou
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, No. 29 Yudao Street, Nanjing, 210016, China
| | - Yonghui Zhao
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, No. 29 Yudao Street, Nanjing, 210016, China.
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2
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Liu D, Hao L, Zhu W, Yang X, Yan X, Guan C, Xie Y, Pang S, Chen Z. Recent Progress in Resonant Acoustic Metasurfaces. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7044. [PMID: 37959641 PMCID: PMC10648603 DOI: 10.3390/ma16217044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/15/2023]
Abstract
Acoustic metasurfaces, as two-dimensional acoustic metamaterials, are a current research topic for their sub-wavelength thickness and excellent acoustic wave manipulation. They hold significant promise in noise reduction and isolation, cloaking, camouflage, acoustic imaging, and focusing. Resonant structural units are utilized to construct acoustic metasurfaces with the unique advantage of controlling large wavelengths within a small size. In this paper, the recent research progresses of the resonant metasurfaces are reviewed, covering the design mechanisms and advances of structural units, the classification and application of the resonant metasurfaces, and the tunable metasurfaces. Finally, research interest in this field is predicted in future.
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Affiliation(s)
- Dongan Liu
- College of Science, Xi’an University of Science and Technology, Xi’an 710054, China (C.G.)
| | - Limei Hao
- College of Science, Xi’an University of Science and Technology, Xi’an 710054, China (C.G.)
| | - Weiren Zhu
- Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiao Yang
- College of Science, Xi’an University of Science and Technology, Xi’an 710054, China (C.G.)
| | - Xiaole Yan
- College of Science, Xi’an University of Science and Technology, Xi’an 710054, China (C.G.)
| | - Chen Guan
- College of Science, Xi’an University of Science and Technology, Xi’an 710054, China (C.G.)
| | - You Xie
- College of Science, Xi’an University of Science and Technology, Xi’an 710054, China (C.G.)
| | - Shaofang Pang
- College of Science, Xi’an University of Science and Technology, Xi’an 710054, China (C.G.)
| | - Zhi Chen
- Department of Applied Physics, Northwestern Polytechnical University, Xi’an 710129, China;
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3
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Comandini G, Ouisse M, Ting VP, Scarpa F. Acoustic transmission loss in Hilbert fractal metamaterials. Sci Rep 2023; 13:19058. [PMID: 37925576 PMCID: PMC10625595 DOI: 10.1038/s41598-023-43646-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 09/26/2023] [Indexed: 11/06/2023] Open
Abstract
Acoustic metamaterials are increasingly being considered as a viable technology for sound insulation. Fractal patterns constitute a potentially groundbreaking architecture for acoustic metamaterials. We describe in this work the behaviour of the transmission loss of Hilbert fractal metamaterials used for sound control purposes. The transmission loss of 3D printed metamaterials with Hilbert fractal patterns related to configurations from the zeroth to the fourth order is investigated here using impedance tube tests and Finite Element models. We evaluate, in particular, the impact of the equivalent porosity and the relative size of the cavity of the fractal pattern versus the overall dimensions of the metamaterial unit. We also provide an analytical formulation that relates the acoustic cavity resonances in the fractal patterns and the frequencies associated with the maxima of the transmission losses, providing opportunities to tune the sound insulation properties through control of the fractal architecture.
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Affiliation(s)
- Gianni Comandini
- Bristol Composite Institute (BCI), School of Civil, Aerospace and Mechanical Engineering (CAME), University of Bristol, Bristol, UK.
- SUPMICROTECH, Université de Franche-Comté, CNRS, Institut FEMTO-ST, 25000, Besançon, France.
| | - Morvan Ouisse
- SUPMICROTECH, Université de Franche-Comté, CNRS, Institut FEMTO-ST, 25000, Besançon, France
| | - Valeska P Ting
- Bristol Composite Institute (BCI), School of Civil, Aerospace and Mechanical Engineering (CAME), University of Bristol, Bristol, UK
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Fabrizio Scarpa
- Bristol Composite Institute (BCI), School of Civil, Aerospace and Mechanical Engineering (CAME), University of Bristol, Bristol, UK
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4
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Xu M, Harley WS, Ma Z, Lee PVS, Collins DJ. Sound-Speed Modifying Acoustic Metasurfaces for Acoustic Holography. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2208002. [PMID: 36657796 DOI: 10.1002/adma.202208002] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 01/13/2023] [Indexed: 06/17/2023]
Abstract
Acoustic metasurfaces offer unique capabilities to steer and direct acoustic fields, though these are generally composed of complex 3D structures, complicating their fabrication and applicability to higher frequencies. Here, an ultrathin metasurface approach is demonstrated, wherein planarized micropillars in a discretized phase array are utilized. This subwavelength metasurface is easily produced via a single-step etching process and is suitable for megahertz-scale applications. The flexibility of this approach is further demonstrated in the production of complex acoustic patterns via acoustic holography. This metasurface approach, with models used to predict their behavior, has broad potential in applications where robust, high-frequency acoustic manipulation is required, including microfluidics, cell/tissue engineering, and medical ultrasound.
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Affiliation(s)
- Mingxin Xu
- Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - William S Harley
- Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - Zhichao Ma
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Peter V S Lee
- Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - David J Collins
- Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, 3010, Australia
- Graeme Clarke Institute, University of Melbourne, Parkville, Victoria, 3052, Australia
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5
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Gao S, Zeng Q, Gong M, Lan J, Liu X. An Acoustic Flat Lens for Broadband Focusing via Cross-Shape Structure. MICROMACHINES 2022; 14:12. [PMID: 36677075 PMCID: PMC9862764 DOI: 10.3390/mi14010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
The manipulation of refracted wavefronts is eye-catching for owning attractive applications. In this article, an airborne acoustic flat lens for broadband focusing via cross-shape structure was proposed and demonstrated, introducing the broadband manipulation of wavefronts. The designed metasurface employs gradient refractive index cells to redirect the sound wave. Based on our theory, the effective refractive indexes of our unit cells can be easily calculated. The shackle of narrowband metasurfaces is conquered, and applications in medical ultrasound imaging are just around the corner.
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Affiliation(s)
- Shenlian Gao
- Key Laboratory of Modern Acoustics, Institute of Acoustics, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Qinglei Zeng
- Key Laboratory of Modern Acoustics, Institute of Acoustics, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Mengyang Gong
- Key Laboratory of Modern Acoustics, Institute of Acoustics, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Jun Lan
- College of Computer Science and Technology, Nanjing Tech University, Nanjing 211800, China
| | - Xiaozhou Liu
- Key Laboratory of Modern Acoustics, Institute of Acoustics, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
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Melnikov A, Köble S, Schweiger S, Chiang YK, Marburg S, Powell DA. Microacoustic Metagratings at Ultra-High Frequencies Fabricated by Two-Photon Lithography. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200990. [PMID: 35466579 PMCID: PMC9284164 DOI: 10.1002/advs.202200990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/17/2022] [Indexed: 06/14/2023]
Abstract
The recently proposed bianisotropic acoustic metagratings offer promising opportunities for passive acoustic wavefront manipulation, which is of particular interest in flat acoustic lenses and ultrasound imaging at ultra-high frequency ultrasound. Despite this fact, acoustic metagratings have never been scaled to MHz frequencies that are common in ultrasound imaging. One of the greatest challenges is the production of complex microscopic structures. Owing to two-photon polymerization, a novel fabrication technique from the view of acoustic metamaterials, it is now possible to precisely manufacture sub-wavelength structures in this frequency range. However, shrinking in size poses another challenge; the increasing thermoviscous effects lead to a drop in efficiency and a frequency downshift of the transmission peak and must therefore be taken into account in the design. In this work three microacoustic metagrating designs refracting a normally incident wave toward -35° at 2 MHz are proposed. In order to develop meta-atoms insensitive to thermoviscous effects shape optimization techniques incorporating the linearized Navier-Stokes equations discretized with finite element method are used. The authors report for the first time microscopic acoustic metamaterials manufactured using two-photon polymerization and, subsequently, experimentally verify their effectiveness using an optical microphone as a detector in a range from 1.8 to 2.2 MHz.
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Affiliation(s)
- Anton Melnikov
- Monolithically Integrated Actuator and Sensor SystemsFraunhofer Institute for Photonic Microsystems IPMS01109DresdenGermany
| | - Sören Köble
- Monolithically Integrated Actuator and Sensor SystemsFraunhofer Institute for Photonic Microsystems IPMS01109DresdenGermany
| | - Severin Schweiger
- Monolithically Integrated Actuator and Sensor SystemsFraunhofer Institute for Photonic Microsystems IPMS01109DresdenGermany
| | - Yan Kei Chiang
- School of Engineering and Information TechnologyUniversity of New South WalesCanberra2612Australia
| | - Steffen Marburg
- Chair of Vibro‐Acoustics of Vehicles and MachinesTechnical University of Munich85748GarchingGermany
| | - David A. Powell
- School of Engineering and Information TechnologyUniversity of New South WalesCanberra2612Australia
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7
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Leakage Effect on the Transmission Properties of a Duct Loaded with a Helmholtz Resonator. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12052402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The characteristics of transmitted acoustic field have important significance to the leakage detection and the acoustic metasurface technology. When the additional leak holes are present, the conventional single neck Helmholtz resonator will naturally become the one with multiple necks. Based on such a background, in this paper, the effects of leakages on the transmission properties of a Duct Helmholtz Resonator (DHR) device is investigated both analytically and numerically. A set of closed-form formulas are derived to analytically predict the transmission spectra of the DHR device with leakages. The theoretical results are compared with COMSOL predictions. The simulation results show that the number and width of leak holes have significant influences on the amplitude, phase shift of the transmitted wave, and resonance frequency of the DHR system.
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8
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Fuster JM, Pérez-López S, Candelas P. Design of Acoustic Bifocal Lenses Using a Fourier-Based Algorithm. SENSORS 2021; 21:s21248285. [PMID: 34960378 PMCID: PMC8705275 DOI: 10.3390/s21248285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/03/2021] [Accepted: 12/09/2021] [Indexed: 11/16/2022]
Abstract
In this work, we develop a new design method based on fast Fourier transform (FFT) for implementing zone plates (ZPs) with bifocal focusing profiles. We show that the FFT of the governing binary sequence provides a discrete sequence of the same length, which indicates the location of the main foci at the ZP focusing profile. Then, using reverse engineering and establishing a target focusing profile, we are capable of generating a binary sequence that provides a ZP with the desired focusing profile. We show that this design method, based on the inverse fast Fourier transform (IFFT), is very flexible and powerful and allows to tailor the design of bifocal ZPs to achieve focusing profiles with the desired foci locations and resolutions. The key advantage of our design algorithm, compared to other alternatives presented in previous works, is that our method provides bifocal focusing profiles with an absolute control of the foci locations. Moreover, although we analyze the performance of this novel design algorithm for underwater ultrasonics, it can also be successfully extended to different fields of physics, such as optics or microwaves, where ZPs are widely employed.
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9
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Candelas P, Pérez-López S, Fuster JM. On the Design of Soret Zone Plates Based on Binary Sequences Using Directional Transducers. SENSORS 2021; 21:s21186086. [PMID: 34577292 PMCID: PMC8468239 DOI: 10.3390/s21186086] [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: 07/30/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 11/24/2022]
Abstract
In this work, we analyze the effect of the distribution of transparent Fresnel regions over the focusing profile of Soret Zone Plates (SZP) based on binary sequences. It is shown that this effect becomes very significant in those fields where directional transducers are employed, such as microwaves or acoustics. A thorough analysis of both the SZP transmission efficiency and the focusing enhancement factor is presented. Moreover, experimental measurements are also carried out for a particular type of binary sequence, the Cantor ternary set, validating the theoretical model and demonstrating that the distribution of transparent Fresnel regions becomes a critical parameter in applications requiring directional emitters.
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10
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Fuster JM, Pérez-López S, Belmar F, Candelas P. Analysis of Predistortion Techniques on Fresnel Zone Plates in Ultrasound Applications. SENSORS 2021; 21:s21155066. [PMID: 34372303 PMCID: PMC8347042 DOI: 10.3390/s21155066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/20/2021] [Accepted: 07/23/2021] [Indexed: 12/04/2022]
Abstract
In this work, we analyze the effect of predistortion techniques on the focusing profile of Fresnel Zone Plates (FZPs) in ultrasound applications. This novel predistortion method is based on either increasing or decreasing the width of some of the FZP Fresnel rings by a certain amount. We investigate how the magnitude of the predistortion, as well as the number and location of the predistorted rings, influences the lens focusing profile. This focusing profile can be affected in different ways depending on the area of the lens where the predistortion is applied. It is shown that when the inner area of the lens, closer to its center, is predistorted, this technique allows the control of the focal depth at the main focus. However, when the predistortion is applied to an area farther from the center of the lens, the acoustic intensity distribution among the main focus and the closest adjacent secondary foci can be tailored at a certain degree. This predistortion technique shows great potential and can be used to control, modify and shape the FZP focusing profile in both industrial and therapeutic applications.
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11
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Acoustic waveguide with virtual soft boundary based on metamaterials. Sci Rep 2020; 10:981. [PMID: 31969667 PMCID: PMC6976684 DOI: 10.1038/s41598-020-57986-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/03/2020] [Indexed: 11/09/2022] Open
Abstract
The use of acoustic metamaterials with novel phenomena to design acoustic waveguides with special properties has obvious potential application value. Here, we propose a virtual soft boundary (VSB) model with high reflectivity and half cycle phase loss, which consists of an acoustic propagation layer and an acoustic metamaterial layer with tube arrays. Then the waveguide designed by the VSB is presented, and the numerical and experimental results show that it can separate acoustic waves at different frequencies without affecting the continuity and the flow of the medium in the space. The VSB waveguide can enrich the functions of acoustic waveguides and provide more application prospects.
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12
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Pérez-López S, Fuster JM, Candelas P. M-Bonacci Zone Plates for Ultrasound Focusing. SENSORS 2019; 19:s19194313. [PMID: 31590375 PMCID: PMC6806303 DOI: 10.3390/s19194313] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/27/2019] [Accepted: 10/01/2019] [Indexed: 11/24/2022]
Abstract
In this work, we present a thorough analysis on M-bonacci zone plates for ultrasound focusing applications. These planar lenses are capable of providing bifocal focusing profiles with equal intensity in both foci and become very appealing for a wide range of scenarios including medical and industrial applications. We show that in high-wavelength domains, such as acoustics or microwaves, the separation between both foci can be finely adjusted at the expense of slightly increasing the distortion of the focusing profile, and we introduce a design parameter to deal with this issue and simplify the design process of these lenses. Experimental measurements are in good agreement with numerical simulations and demonstrate the potential of M-bonacci lenses in ultrasound focusing applications.
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Affiliation(s)
- Sergio Pérez-López
- Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 València, Spain.
| | - José Miguel Fuster
- Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 València, Spain.
| | - Pilar Candelas
- Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 València, Spain.
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Ultra-Broadband Acoustic Diode in Open Bend Tunnel by Negative Reflective Metasurface. Sci Rep 2018; 8:16089. [PMID: 30382127 PMCID: PMC6208409 DOI: 10.1038/s41598-018-34314-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 10/15/2018] [Indexed: 11/17/2022] Open
Abstract
We theoretically and numerically propose an open bend tunnel with the capability of realizing ultra-broadband unidirectional transmission. The designed tunnel can isolate acoustic wave incidence from opposite directions and substance like the fluids or objects can exchange freely by employing acoustic gradient metasurface. The underlying mechanism is due to apparent negative reflection in ultra-broadband frequency range when the incoming angle impinging on the metasurface is over the critical incidence. The numerical results keep a good agreement with the theoretical analyses. The proposed design could be employed to generate various situations, like broadband noise control, architectural acoustics and ultrasound imaging.
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