Broadband quasi-perfect sound absorption by a metasurface with coupled resonators at both low- and high-amplitude excitations

Qu, Renhao; Guo, Jingwen; Fang, Yi; Zhong, Siyang; Zhang, Xin

doi:10.1016/j.ymssp.2023.110782

Cited by 14 publications

(3 citation statements)

References 48 publications

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“…The sound absorption coefficient of the structure was measured through an impedance tube [134]. Other novel sound-absorbing metamaterials can achieve high sound-absorption performance at medium and low frequencies [135][136][137].…”

Section: Other Novel Combination Metamaterialsmentioning

confidence: 99%

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Zhang,

et al. 2024

Acoustics

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Acoustic metamaterials (AMs) composed of periodic artificial structures have extraordinary sound wave manipulation capabilities compared with traditional acoustic materials, and they have attracted widespread research attention. The sound insulation performance of thin-walled structures commonly used in engineering applications with restricted space, for example, vehicles’ body structures, and the latest studies on the sound insulation of thin-walled metamaterial structures, are comprehensively discussed in this paper. First, the definition and math law of sound insulation are introduced, alongside the primary methods of sound insulation testing of specimens. Secondly, the main sound insulation acoustic metamaterial structures are summarized and classified, including membrane-type, plate-type, and smart-material-type sound insulation metamaterials, boundaries, and temperature effects, as well as the sound insulation research on composite structures combined with metamaterial structures. Finally, the research status, challenges, and trends of sound insulation metamaterial structures are summarized. It was found that combining the advantages of metamaterial and various composite panel structures with optimization methods considering lightweight and proper wide frequency band single evaluator has the potential to improve the sound insulation performance of composite metamaterials in the full frequency range. Relative review results provide a comprehensive reference for the sound insulation metamaterial design and application.

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Section: Other Novel Combination Metamaterialsmentioning

confidence: 99%

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Zhang,

et al. 2024

Acoustics

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“…First, the target fitness function is set. As shown in equation (16), the fitness function is the integral area of the sound absorption coefficient curve of the sound absorber. The best sound absorption effect can be obtained by optimizing the area of the sound absorption coefficient curve to reach the maximum value.…”

Section: Optimized Sound Absorption Performancementioning

confidence: 99%

“…Additionally, the sound-absorption performance of traditional MPPs can be enhanced by altering the shape [7][8][9], designing curved and folded backing cavities [10,11], coupling MPPs with different porosities [12], and employing ultrafine apertures [13]. Similarly, to widen the bandwidth of HR, methods such as the parallel connection of multiple HRs [14][15][16] and hierarchical serial connection of HRs [17,18] can be employed, once again resulting in a larger absorber. Furthermore, changing the shape of the HR neck and the layout of the HR resonant cavity are common methods [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Development of a low-frequency broadband sound absorber based on a micro-perforated panel coupled with the Helmholtz resonator system

Li,

Wu,

Mao

et al. 2024

Phys. Scr.

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In the field of vibration and noise reduction, micro-perforated panel (MPP) structures and Helmholtz resonators (HR) play crucial roles as common sound-absorbing elements. However, independently applied MPP and HR structures cannot provide sufficiently wide absorption bandwidths at low frequencies. To achieve low-frequency broadband sound absorption, this study proposes a novel low-frequency broadband sound absorption structure (EMH) based on MPP and HR with a thickness of 40 mm to achieve a subwavelength, efficient, and compact design. We establish theoretical models of MPP and HR coupled systems, systematically analyze the sound absorption performance of same-element and different-element coupled structures, and employ the particle swarm optimization (PSO) algorithm to obtain structural parameters for efficient coupled sound absorption. Furthermore, we compare the sound absorption performance of three optimized coupled structures (MPP-coupled (SM), HR-coupled (SH), and MPP and HR-coupled) from the perspective of the theoretical calculation of the sound absorption coefficient and finite element analysis of the sound absorption mechanism. Finally, samples fabricated using 3D printing technology are tested in an impedance tube. The results demonstrate that efficient coupled sound absorption of MPP and HR can be achieved through parameter optimization. SH and SM exhibit nearly perfect sound absorption in the frequency ranges of 323–495 Hz and 615–1600 Hz, respectively, whereas the effective absorption bandwidth of EMH can reach 1225 Hz in the range of 200–1600 Hz. EMH shows superior low-frequency broadband sound absorption performance with a lightweight and simple structure, which holds the potential for application in low-frequency noise control.

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