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Acoustic Metasurface With Hybrid Resonances

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• A hybrid compressible acoustic metamaterial with subwavelength thickness for sound attenuation is designed. • Experimental and analytical results confirm stable low-frequency absorption with structural deformation. • In the present study, we focused on an acoustic metasurface with membrane resonators. Decorated Membrane Resonator(DMR)[2] has been proposed for sound absorbing device utilizing hybrid resonance between membrane and air layer. An impedance matched surface is able, in principle, to totally absorb the incident sound and yield no reflection, and this is desired in many acoustic applications. Here we demonstrate a design of impedance matched sound absorbing surface with a simple construction. By coupling different resonators and generating a hybrid resonance mode, we designed and

Significantly, we sort out some efforts taken to explore acoustic ventilated metamaterials based on hybrid-type resonances. Furthermore, they proposed a metasurface based on the concept of space coiling and hybrid resonance between subwavelength HRs to improve low-frequency sound absorption37.

Nonlocal Acoustic Moiré Hyperbolic Metasurfaces - Han - Advanced ...

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, Low-frequency noise has long been a challenge in noise control, and acoustic metasurface has emerged as one of the most viable solutions for low-frequency acoustic control by virtue of its ultra-thin geometry. Acoustic metasurface is generally controlled by several structural parameters. 1. The document describes an acoustic metasurface that can perfectly absorb sound at tunable frequencies through hybrid resonances. 2. The metasurface

Recent Progress in Resonant Acoustic Metasurfaces

Acoustic metamaterials have expanded the capabilities of acoustic wave manipulation with diverse application potentials, such as negative refraction, superresolution, cloaking, enhanced absorption, nonreciprocity, active control, and material tunability. Acoustic

The adjustability rules of the focusing position is analyzed. This work presents an innovative type of acoustic metasurface structure based on the Helmholtz resonator in order to generate an acoustic metasurface with multifunctional effects, such as An impedance-matched surface has the property that an incident wave generates no reflection. Here we demonstrate that by using a simple construction, an acoustically reflecting surface can acquire hybrid resonances and becomes impedance-matched to airborne sound at tunable frequencies, such that no reflection is generated. Each resonant cell of the metasurface is deep Supporting: 10, Mentioning: 596 – An impedance-matched surface has the property that an incident wave generates no reflection. Here we demonstrate that by using a simple construction, an acoustically reflecting surface can acquire hybrid resonances and becomes impedance-matched to airborne sound at tunable frequencies, such that no reflection is generated. Each

We introduce a multicoiled acoustic metasurface providing quasiperfect absorption (reaching 99.99% in experiments) at an extremely low J. Mei. et al. [7] achieved very high acoustic absorption at resonant frequencies through the concentration of curvature energy at the perimeters of asymmetrically shaped platelets and G. Ma. et al. [15] investigated the acoustic metasurfaces with hybrid resonances. Compared with the previously reported acoustic metasurfaces working in pure reflection or pure transmission mode, the proposed acoustic full-space metasurface possesses more degrees of freedom (i.e., selective working frequency and operating mode), and thus greatly enhance the ability to modulate sound waves and enrich acoustic

  • A sound absorbing metasurface with coupled resonators
  • Recent Progress in Resonant Acoustic Metasurfaces
  • Acoustic metasurface with hybrid resonances,Nature Materials
  • 江雪-智慧医疗超声实验室

We present near-perfect sound absorption using a metasurface composed of meta-atoms (MAs) which are subwavelength Helmholtz resonators (HRs) with cavities non-uniformly partitioned by membranes

FIGURE 2. Examples of mechanical tuning. (A) Mechanism of programmable acoustic metasurface composed of a straight channel and five

We propose an acoustic metasurface for perfect absorption at dual frequencies within a compact space. Meta-molecules of the metasurface contain four subwavelength meta-atoms whose cavities are coiled by three foldings. The meta-atoms comprising a meta-molecule have slightly different neck sizes to obtain hybrid resonances at desired Utilizing the parallel coupling, a hybrid metasurface composed of 25 coplanar imperfect neck-embedded Helmholtz resonators (NEHRs) with a uniform thickness of 5 cm exhibits quasi-perfect acoustic absorption (α> 0.9) in the band from 297 to 479 Hz.

Abstract Conventional acoustic focusing requires an array of actuators or waveguides to form a complex wavefront, resulting in a high cost or bulky size. In this paper, an original gradient Helmholtz-resonator (HR)-based acoustic metasurface (AMS) is presented.

An ultraslow-fluid-like unit cell composed of acoustic channels, arranged in a zigzag shape, exhibits various tunable Mie resonances. It is used for the construction of a highly reflective Xue Jiang, Yong Li and Likun Zhang, Thermoviscous effects on sound transmission through a metasurface of hybrid resonances, Journal of the Acoustical Society of America, 2017.

(a) Schematic of the adaptive acoustic metasurface and its unit cell ...

Acoustic metasurface with hybrid resonances Guancong Ma1†, Min Yang1†, Songwen Xiao1, Zhiyu Yang1 and Ping Sheng1,2* ction. Here we demonstrate that by using a simple construction, an acoustically reflecting surface can acquire hybrid resonances and becomes impedance-matched to airborne sound at tunable frequencies, such that no reflection Here, by combining acoustic metasurface and adaptive wavefield shaping, we demonstrate the versatile control of reverberating sound fields in a room. This is achieved through the design and the realization of a binary phase-modulating spatial sound modulator that is based on an actively reconfigurable acoustic metasurface.

An acoustic-mechanical multifunctional metamaterial (MM) designed by integrating Helmholtz resonance with lattice structure.

  • 圆弧形超表面对透射声波的可调控制与功能转换
  • 可实现宽频宽角度隔声的薄层通风结构
  • Acoustic Metasurface With Hybrid Resonances
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Multifunctional acoustic metasurface based on an array of Helmholtz resonators Yifan Zhu and Badreddine Assouar Phys. Rev. B 99, 174109 — Published 20 May 2019 DOI: 10.1103/PhysRevB.99.174109 Multifunctional acoustic metasurface based Ma et al. [9] designed an acoustic metasurface with hybrid resonance to achieve perfect sound absorption at 152 Hz. Different sound energy loss phenomena are produced by adjusting the pre-tension of the membrane, the location and size of

Ryoo and Jeon [28] designed an acoustic metasurface for perfect absorption at dual frequencies based on hybrid resonance and space-coiling. Long et al. [29] proposed a near-unity broadband absorber constructed by coiled space resonators covered by an ultrathin surface sponge coating. The Fano⁃like resonance coupling between the layers is used to effectively isolate the acoustic energy in a specific frequency band. And the design has many important advantages such as planar profile，thin thickness (λ / 5.2)，high ventilation (ventilation area >50%)，simple design and preparation，wide working frequency and

This letter analytically and numerically examines sound transmission through a metasurface of hybrid resonances in the presence of thermoviscous dissipation. The metasurface unit of a subwavelength thickness consists of a slit and series of

科研通，让源源不断科研创作灵感的涌现之地 Abstract This study presents a novel acoustic metasurface with a coplanar series-type Helmholtz resonator with curled necks. Using extended necks that are embedded in cavities enables one to significantly reduce the resonance frequency of the resonator.

An impedance-matched surface has the property that an incident wave generates no reflection. Here we demonstrate that by using a simple construction, an acoustically reflecting surface can acquire hybrid resonances and becomes impedance-matched to airborne sound at tunable frequencies, such that no reflection is generated. Each resonant cell of the metasurface is deep Such hybrid resonances are largely the linear superpositionofthetwooriginalnearbyeigenmodes,andtherefore retain their characteristics. Central to understanding the hybrid modes’ behaviour and functionalities is that only the piston-like component of the average membrane displacement, hWi, couples to transmission and reflection.

Acoustic metasurfaces, as two-dimensional acoustic metamaterials, are a current research topic for their sub-wavelength thickness

In this study, we fabricated multifunctional metastructures from carbon fiber-reinforced plastic composites using additive manufacturing