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A compact low-frequency sound absorption metastructure realized by resonators with wavy bending necks.

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Title: A compact low-frequency sound absorption metastructure realized by resonators with wavy bending necks.
Authors: Zhang, Songyi1 (AUTHOR), Song, Ailing1 (AUTHOR) ailingsong@ecust.edu.cn, Wang, Shuai1 (AUTHOR), Yu, Xinhai1 (AUTHOR) yxhh@ecust.edu.cn
Source: Journal of Physics D: Applied Physics. 1/19/2024, Vol. 57 Issue 3, p1-12. 12p.
Subjects: Absorption of sound, Resonators, Finite element method, Design techniques
Abstract: In this work, a compact low-frequency sound absorption metastructure composed of multiple resonators with embedded wavy bending necks is proposed. By arranging this metastructure in parallel and optimizing the parameters, it exhibits excellent broadband sound absorption capability in low-frequency range and has a much more compact volume. Compared with the traditional resonators, an individual resonator of this metastructure can move down the absorption frequency about 120 Hz while maintaining the same thickness. Furthermore, different resonator units are combined into a sound absorption array by employing appropriate design techniques. We first built a small metastructure composed of four units to demonstrate the correctness and accuracy of our design method. Both theoretical models and finite element simulation models are built and experimental results show good agreement between them. To achieve the same absorption value and frequency range, the thickest resonator in the traditional resonator array must be 30% thicker than the one in the wavy bending neck resonator array, which means the overall size of the structure is 30% larger. Following this design method, perfect sound absorption within the frequency range of 248 Hz–420 Hz is achieved with a compact volume of 53 mm in radius and 47 mm in height. The design strategy presents a new approach to achieve perfect broadband low-frequency sound absorption. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Physics D: Applied Physics is the property of IOP Publishing 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.)
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DbLabel: Engineering Source
An: 173163573
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  Data: A compact low-frequency sound absorption metastructure realized by resonators with wavy bending necks.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Songyi%22">Zhang, Songyi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Ailing%22">Song, Ailing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ailingsong@ecust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Shuai%22">Wang, Shuai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Xinhai%22">Yu, Xinhai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yxhh@ecust.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Physics+D%3A+Applied+Physics%22">Journal of Physics D: Applied Physics</searchLink>. 1/19/2024, Vol. 57 Issue 3, p1-12. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Absorption+of+sound%22">Absorption of sound</searchLink><br /><searchLink fieldCode="DE" term="%22Resonators%22">Resonators</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Design+techniques%22">Design techniques</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this work, a compact low-frequency sound absorption metastructure composed of multiple resonators with embedded wavy bending necks is proposed. By arranging this metastructure in parallel and optimizing the parameters, it exhibits excellent broadband sound absorption capability in low-frequency range and has a much more compact volume. Compared with the traditional resonators, an individual resonator of this metastructure can move down the absorption frequency about 120 Hz while maintaining the same thickness. Furthermore, different resonator units are combined into a sound absorption array by employing appropriate design techniques. We first built a small metastructure composed of four units to demonstrate the correctness and accuracy of our design method. Both theoretical models and finite element simulation models are built and experimental results show good agreement between them. To achieve the same absorption value and frequency range, the thickest resonator in the traditional resonator array must be 30% thicker than the one in the wavy bending neck resonator array, which means the overall size of the structure is 30% larger. Following this design method, perfect sound absorption within the frequency range of 248 Hz–420 Hz is achieved with a compact volume of 53 mm in radius and 47 mm in height. The design strategy presents a new approach to achieve perfect broadband low-frequency sound absorption. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Physics D: Applied Physics is the property of IOP Publishing 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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        Value: 10.1088/1361-6463/ad0309
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      – Code: eng
        Text: English
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        PageCount: 12
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    Subjects:
      – SubjectFull: Absorption of sound
        Type: general
      – SubjectFull: Resonators
        Type: general
      – SubjectFull: Finite element method
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      – SubjectFull: Design techniques
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      – TitleFull: A compact low-frequency sound absorption metastructure realized by resonators with wavy bending necks.
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            NameFull: Zhang, Songyi
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            NameFull: Song, Ailing
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            NameFull: Wang, Shuai
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            NameFull: Yu, Xinhai
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            – D: 19
              M: 01
              Text: 1/19/2024
              Type: published
              Y: 2024
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            – TitleFull: Journal of Physics D: Applied Physics
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