Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials
Manipulating radiation patterns is challenging, especially at low frequencies. In this paper, we demonstrate that acoustic metamaterials arranged as an array of quadrupoles remarkably improve the directionality of acoustic radiation at low frequencies, compared with previous metamaterials arranged a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/1/101 |
| _version_ | 1797444008193032192 |
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| author | Qinglei Zeng Shenlian Gao Yun Lai Xiaozhou Liu |
| author_facet | Qinglei Zeng Shenlian Gao Yun Lai Xiaozhou Liu |
| author_sort | Qinglei Zeng |
| collection | DOAJ |
| description | Manipulating radiation patterns is challenging, especially at low frequencies. In this paper, we demonstrate that acoustic metamaterials arranged as an array of quadrupoles remarkably improve the directionality of acoustic radiation at low frequencies, compared with previous metamaterials arranged as monopole and dipole structures. The directivity of the acoustic radiation can be adjusted by changing the characteristic parameter and the symmetry of the structure, which provides a flexible method of adjusting radiation directions. The directionality can be further improved by constructing a linear array. Our work establishes acoustic radiation control via quadrupolar metamaterials. |
| first_indexed | 2024-03-09T13:06:19Z |
| format | Article |
| id | doaj.art-102f7c9c3ef04606a666872ca0791e21 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T13:06:19Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-102f7c9c3ef04606a666872ca0791e212023-11-30T21:48:00ZengMDPI AGCrystals2073-43522023-01-0113110110.3390/cryst13010101Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic MetamaterialsQinglei Zeng0Shenlian Gao1Yun Lai2Xiaozhou Liu3Key Laboratory of Modern Acoustics, Institute of Acoustics and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, ChinaKey Laboratory of Modern Acoustics, Institute of Acoustics and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, ChinaKey Laboratory of Modern Acoustics, Institute of Acoustics and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, ChinaKey Laboratory of Modern Acoustics, Institute of Acoustics and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, ChinaManipulating radiation patterns is challenging, especially at low frequencies. In this paper, we demonstrate that acoustic metamaterials arranged as an array of quadrupoles remarkably improve the directionality of acoustic radiation at low frequencies, compared with previous metamaterials arranged as monopole and dipole structures. The directivity of the acoustic radiation can be adjusted by changing the characteristic parameter and the symmetry of the structure, which provides a flexible method of adjusting radiation directions. The directionality can be further improved by constructing a linear array. Our work establishes acoustic radiation control via quadrupolar metamaterials.https://www.mdpi.com/2073-4352/13/1/101acoustic metamaterialsF-P resonance effecttwo-dimensional Helmholtz resonatorlinear arraydipolequadrupole |
| spellingShingle | Qinglei Zeng Shenlian Gao Yun Lai Xiaozhou Liu Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials Crystals acoustic metamaterials F-P resonance effect two-dimensional Helmholtz resonator linear array dipole quadrupole |
| title | Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials |
| title_full | Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials |
| title_fullStr | Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials |
| title_full_unstemmed | Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials |
| title_short | Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials |
| title_sort | improving the directionality of low frequency acoustic radiation by a finite array of quadrupolar sources with acoustic metamaterials |
| topic | acoustic metamaterials F-P resonance effect two-dimensional Helmholtz resonator linear array dipole quadrupole |
| url | https://www.mdpi.com/2073-4352/13/1/101 |
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