Pressure amplification and directional acoustic sensing based on a gradient metamaterial coupled with space-coiling structure
The detection and localization of weak sound sources are a topic of great interest in a wide range of applications, but generally require a pressure amplification and directivity acoustic system. Although acoustic technologies have been advanced in recent years, the realization of pressure amplifica...
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| Published in | Mechanical systems and signal processing Vol. 181; p. 109499 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
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01.12.2022
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| Abstract | The detection and localization of weak sound sources are a topic of great interest in a wide range of applications, but generally require a pressure amplification and directivity acoustic system. Although acoustic technologies have been advanced in recent years, the realization of pressure amplification and directivity acoustic systems remains a slippery subject. Here, we propose a gradient acoustic metamaterial (GAM) coupled with space-coiling structure (GAM-SCS) for the detection and localization of weak sound sources. The GAM-SCS is evaluated both numerically and experimentally. Compared with the GAM without space-coiling structure, the GAM-SCS has a better pressure amplification performance which enables the sound signals to be pre-amplified. Meanwhile, the induced space-coiling structure, making use of subwavelength features, also enables the GAM-SCS to work in a lower frequency. Furthermore, the directivity of the GAM-SCS also shines lights on directional acoustic sensing to resist noise interference. We believe that this work opens up a new vista to realize the detection and localization of weak sound sources based on acoustic metamaterials. |
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| AbstractList | The detection and localization of weak sound sources are a topic of great interest in a wide range of applications, but generally require a pressure amplification and directivity acoustic system. Although acoustic technologies have been advanced in recent years, the realization of pressure amplification and directivity acoustic systems remains a slippery subject. Here, we propose a gradient acoustic metamaterial (GAM) coupled with space-coiling structure (GAM-SCS) for the detection and localization of weak sound sources. The GAM-SCS is evaluated both numerically and experimentally. Compared with the GAM without space-coiling structure, the GAM-SCS has a better pressure amplification performance which enables the sound signals to be pre-amplified. Meanwhile, the induced space-coiling structure, making use of subwavelength features, also enables the GAM-SCS to work in a lower frequency. Furthermore, the directivity of the GAM-SCS also shines lights on directional acoustic sensing to resist noise interference. We believe that this work opens up a new vista to realize the detection and localization of weak sound sources based on acoustic metamaterials. |
| ArticleNumber | 109499 |
| Author | Chen, Tinggui Yu, Dejie Wang, Chengyong |
| Author_xml | – sequence: 1 givenname: Tinggui surname: Chen fullname: Chen, Tinggui – sequence: 2 givenname: Chengyong surname: Wang fullname: Wang, Chengyong – sequence: 3 givenname: Dejie surname: Yu fullname: Yu, Dejie email: djyu@hnu.edu.cn |
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| Snippet | The detection and localization of weak sound sources are a topic of great interest in a wide range of applications, but generally require a pressure... |
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| StartPage | 109499 |
| SubjectTerms | Acoustic sensing Coupled acoustic metamaterials Directivity Pressure amplification |
| Title | Pressure amplification and directional acoustic sensing based on a gradient metamaterial coupled with space-coiling structure |
| URI | https://dx.doi.org/10.1016/j.ymssp.2022.109499 |
| Volume | 181 |
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