Synergistic acoustic metamaterial for soundproofing: Combining membrane and locally resonant structure

Jang, Jun-Young; Song, Ki‐Hoon

doi:10.1016/j.ijmecsci.2023.108500

Cited by 15 publications

(2 citation statements)

References 81 publications

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“…The dynamic effective density estimated by the impedance model illustrated the sound insulation mechanism of the design, and its sound insulation performance was verified by finite element modeling simulation. The radiated sound pressure of the sample under acoustic excitation was measured in a semi-anechoic chamber, verifying its excellent low-frequency and broadband sound insulation effects [133]. To avoid a sharp absorption peak that cannot achieve critical coupling in the rectangular sonic black hole at low frequencies, Hruška et al designed the slits of the rectangular sonic black hole to be partially filled with porous materials, as shown in Figure 14c.…”

Section: Other Novel Combination Metamaterialsmentioning

confidence: 88%

“…(a) Design element and sample of sandwich structure of double membrane-type acoustic metamaterials combined with a Helmholtz resonator structure placed in the impedance tube, reproduced from[132]. (b) Illustration of the synergetic soundproofing acoustic metamaterial plate, its unit cell, and picture of sound pressure level experimental setup, reproduced from[133]. (c) Geometry of the studied sonic black hole with partial porous filling (marked in blue), reproduced from[134].…”

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confidence: 99%

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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: 88%

mentioning

confidence: 99%