Multilayer coupled plate-type acoustic metamaterials for low-frequency broadband sound insulation

Yang, Xu-Hao; Kang, Yingzi; Xie, Xinxing; Qu, Zhang; Shangguan, Wen-Bin

doi:10.1016/j.apacoust.2023.109399

Cited by 13 publications

(3 citation statements)

References 44 publications

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“…The sound insulation of a sample with a size of 506 mm × 506 mm, composed of 64 periodic square metamaterial units, was tested in a reverberation-anechoic chamber. The results showed that in the range of 360~500 Hz, the IL increased by at least 5 dB, with a maximum increase of up to 17 dB [131].…”

Section: More Complex Large Size Multi-layer Acoustic Metamaterialsmentioning

confidence: 95%

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: More Complex Large Size Multi-layer Acoustic Metamaterialsmentioning

confidence: 95%

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Zhang,

et al. 2024

Acoustics

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“…The findings demonstrate that adding a glass fiber felt sound absorption layer to the transmission side of the acoustic metamaterial panel can improve its performance and increase its ability to insulate sound. Yang et al [122] suggested a multi-layer linked plate-type acoustic metamaterial (MPAM) that is made up of a double-layered fiber with varying densities and plate-like acoustic metamaterials (PAM).The research results show that the MPAM exhibits significant performance in low-frequency broadband sound isolation. In the 360-950 Hz frequency range, the sound insulation of MPAM structures is at least 5 dB and up to 17 dB better than that of structures without a PAM layer.…”

Section: Composite Structure Of Porous Materials and Acoustic Metamat...mentioning

confidence: 99%

Research progress of noise reduction of composite structures of porous materials and acoustic metamaterials

Huang,

Yang,

Talukder

et al. 2024

Phys. Scr.

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Noise pollution is an important problem affecting people's lives and work quality. In the current noise reduction materials, the porous sound absorption materials usually only haveagood sound absorption effect for medium and high -frequency sound waves, and the sound absorption effect for low -frequency sound waves is relatively weak. However, in recent years, the research on acoustic metamaterials has made a breakthrough which can effectively absorb or isolate low-frequency sound waves. Therefore, researchers propose to combine porous sound-absorbing materials with acoustic metamaterials to form a composite structure, that broadens the frequency range of noise reduction, so as to achieve the goal of full-frequency domain noise reduction. This paper first introduces the research progress of porous materials and acoustic metamaterials, and then introduces the research progress of composite structures that are made of porous materials and acoustic metamaterials. Finally, the application prospect of the composite field of porous sound-absorbing materials and acoustic metamaterials are summarized.

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“…The issues of vibration isolation of systems require further detailed studies and empirical research, especially in the context of the development of materials engineering, regarding e.g. : nanoparticles and composite structures [3,6], coating on fiber insolation of thermal and vibration processes [10,21], external composite systems [25], acoustic metamaterials for low-frequency broadband vibration and sound insulation [31,32], composites structures studied for specified boundary conditions [34].…”

Section: Fd Fdmentioning

confidence: 99%

Assessment of the effectiveness of mounting the aircraft piston combustion engine on a test stand

Szymański,

Waligórski,

Misztal

2024

Combustion Engines

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The subject of the considerations described in the paper is the problem of efficiency of mounting an aircraft engine on a dyno test bench. The paper presents the empirical research results of vibroacoustic signal application to the evaluation of correctness of positioning of the Rotax 912 piston aircraft engine. The variability of selected parameters and vibroacoustic characteristics for real engine operating conditions was assessed, and functional relations and their discrete representations were developed, reflecting the efficiency of mounting the object on the frame. Thanks to this process, quantitative measures of the diagnostic assessment of the object were obtained, which can be used in periodic or continuous operational control of the object, taking into account the impact of tribological processes taking place in the test object.

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Multilayer coupled plate-type acoustic metamaterials for low-frequency broadband sound insulation

Cited by 13 publications

References 44 publications

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Research progress of noise reduction of composite structures of porous materials and acoustic metamaterials

Assessment of the effectiveness of mounting the aircraft piston combustion engine on a test stand

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