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Enhanced sound absorption properties of a semi-open underwater periodic acoustic metamaterial.

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Title: Enhanced sound absorption properties of a semi-open underwater periodic acoustic metamaterial.
Authors: Feng, Zihan1 (AUTHOR), Xu, Xiaoliang1 (AUTHOR), Wen, Shurui1 (AUTHOR) wenshurui@hrbeu.edu.cn, Wu, Zhijing1 (AUTHOR), Li, Fengming1 (AUTHOR)
Source: Composite Structures. Jan2025, Vol. 354, pN.PAG-N.PAG. 1p.
Subjects: Absorption of sound, Underwater acoustics, Sound waves, Shear (Mechanics), Viscoelastic materials
Abstract: In order to enhance the underwater low-frequency sound absorption performance, a semi-open underwater periodic acoustic metamaterial (SUPAM) is proposed combining the slit and the rubber shear deformation mechanisms of the acoustic energy dissipation. According to the slit absorber theory and the complex viscosity model of viscoelastic material, the theoretical model for predicting the sound absorption performance of the SUPAM is established using the transfer matrix method, the correctness of which is validated by the well agreement of its result with that of the finite element method and experiment, respectively. The influence of the sound incidence angle, slit width, air cavity height and rubber thickness on the sound absorption property of the SUPAM is discussed. It is found that the introduction of the slit enables acoustic waves to effectively enter the SUPAM and increases the amount of sound energy dissipated by the shear deformation of the rubber damping layer. A sound absorption coefficient above 0.8 can be achieved almost across an ultra-wide frequency range of 176–5000 Hz for the SUPAM composed of metacells based on the stepped design, which shows its extraordinary low-frequency sound absorption performance. [ABSTRACT FROM AUTHOR]
Copyright of Composite Structures is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 182158659
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Enhanced sound absorption properties of a semi-open underwater periodic acoustic metamaterial.
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  Data: <searchLink fieldCode="JN" term="%22Composite+Structures%22">Composite Structures</searchLink>. Jan2025, Vol. 354, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Absorption+of+sound%22">Absorption of sound</searchLink><br /><searchLink fieldCode="DE" term="%22Underwater+acoustics%22">Underwater acoustics</searchLink><br /><searchLink fieldCode="DE" term="%22Sound+waves%22">Sound waves</searchLink><br /><searchLink fieldCode="DE" term="%22Shear+%28Mechanics%29%22">Shear (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Viscoelastic+materials%22">Viscoelastic materials</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In order to enhance the underwater low-frequency sound absorption performance, a semi-open underwater periodic acoustic metamaterial (SUPAM) is proposed combining the slit and the rubber shear deformation mechanisms of the acoustic energy dissipation. According to the slit absorber theory and the complex viscosity model of viscoelastic material, the theoretical model for predicting the sound absorption performance of the SUPAM is established using the transfer matrix method, the correctness of which is validated by the well agreement of its result with that of the finite element method and experiment, respectively. The influence of the sound incidence angle, slit width, air cavity height and rubber thickness on the sound absorption property of the SUPAM is discussed. It is found that the introduction of the slit enables acoustic waves to effectively enter the SUPAM and increases the amount of sound energy dissipated by the shear deformation of the rubber damping layer. A sound absorption coefficient above 0.8 can be achieved almost across an ultra-wide frequency range of 176–5000 Hz for the SUPAM composed of metacells based on the stepped design, which shows its extraordinary low-frequency sound absorption performance. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Composite Structures is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.compstruct.2024.118831
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
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      – SubjectFull: Absorption of sound
        Type: general
      – SubjectFull: Underwater acoustics
        Type: general
      – SubjectFull: Sound waves
        Type: general
      – SubjectFull: Shear (Mechanics)
        Type: general
      – SubjectFull: Viscoelastic materials
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      – TitleFull: Enhanced sound absorption properties of a semi-open underwater periodic acoustic metamaterial.
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            NameFull: Feng, Zihan
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            NameFull: Xu, Xiaoliang
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            NameFull: Wen, Shurui
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            NameFull: Wu, Zhijing
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            NameFull: Li, Fengming
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            – D: 22
              M: 01
              Text: Jan2025
              Type: published
              Y: 2025
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              Value: 354
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