Design of Fresnel acoustic reflector for sub-wavelength broadband sound diffusion
Sound diffusion performance is considered as an important issue in building acoustics. A well-diffused sound field can effectively enhance the human listening experience. In this context, inspired by Fresnel lenses in optics, we design a sub-wavelength acoustic metasurface (termed “Fresnel acoustic...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524001084 |
| _version_ | 1797301575625998336 |
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| author | Mu He Wei-Zhi Luo Van-Hai Trinh Lei Lei Liang Xia Dengke Li |
| author_facet | Mu He Wei-Zhi Luo Van-Hai Trinh Lei Lei Liang Xia Dengke Li |
| author_sort | Mu He |
| collection | DOAJ |
| description | Sound diffusion performance is considered as an important issue in building acoustics. A well-diffused sound field can effectively enhance the human listening experience. In this context, inspired by Fresnel lenses in optics, we design a sub-wavelength acoustic metasurface (termed “Fresnel acoustic reflector”) to achieve broadband uniform diffuse reflections. To this end, an optimization strategy that combines Monte-Carlo search and other derivative-free algorithms is proposed to ensure, as far as possible, a global optimum for the objective function when dealing with the multi-peak problem encountered in complex sound fields. Numerical simulations show that the average normalized diffusion coefficient of the designed Fresnel reflector can reach up to 0.6 in the sub-wavelength frequency range 500–3400 Hz, which exhibits a better broadband diffusion performance compared to the traditional Schroeder diffusers. The simulated sound pressure field is also verified by experimental measurements. From a general perspective, the proposed optimization strategy and simulation framework can benefit the design of interior components in building acoustics. |
| first_indexed | 2024-03-07T23:24:34Z |
| format | Article |
| id | doaj.art-2bc6636978504e79be8f4bef6d866759 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-07T23:24:34Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-2bc6636978504e79be8f4bef6d8667592024-02-21T05:24:23ZengElsevierMaterials & Design0264-12752024-02-01238112736Design of Fresnel acoustic reflector for sub-wavelength broadband sound diffusionMu He0Wei-Zhi Luo1Van-Hai Trinh2Lei Lei3Liang Xia4Dengke Li5State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaInstitute of Vehicle and Energy Engineering, Le Quy Don Technical University, Hanoi 100000, VietnamTREVES Products, Services & Innovation, Reims 51686, FranceState Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Corresponding author.The State Key Laboratory of Heavy-Duty and Express High-Power Electric Locomotive, Zhuzhou 412001, ChinaSound diffusion performance is considered as an important issue in building acoustics. A well-diffused sound field can effectively enhance the human listening experience. In this context, inspired by Fresnel lenses in optics, we design a sub-wavelength acoustic metasurface (termed “Fresnel acoustic reflector”) to achieve broadband uniform diffuse reflections. To this end, an optimization strategy that combines Monte-Carlo search and other derivative-free algorithms is proposed to ensure, as far as possible, a global optimum for the objective function when dealing with the multi-peak problem encountered in complex sound fields. Numerical simulations show that the average normalized diffusion coefficient of the designed Fresnel reflector can reach up to 0.6 in the sub-wavelength frequency range 500–3400 Hz, which exhibits a better broadband diffusion performance compared to the traditional Schroeder diffusers. The simulated sound pressure field is also verified by experimental measurements. From a general perspective, the proposed optimization strategy and simulation framework can benefit the design of interior components in building acoustics.http://www.sciencedirect.com/science/article/pii/S0264127524001084Acoustic metasurfaceFresnel acoustic reflectorDiffuse reflectionParametric optimizationMonte-Carlo searchSub-wavelength scale |
| spellingShingle | Mu He Wei-Zhi Luo Van-Hai Trinh Lei Lei Liang Xia Dengke Li Design of Fresnel acoustic reflector for sub-wavelength broadband sound diffusion Materials & Design Acoustic metasurface Fresnel acoustic reflector Diffuse reflection Parametric optimization Monte-Carlo search Sub-wavelength scale |
| title | Design of Fresnel acoustic reflector for sub-wavelength broadband sound diffusion |
| title_full | Design of Fresnel acoustic reflector for sub-wavelength broadband sound diffusion |
| title_fullStr | Design of Fresnel acoustic reflector for sub-wavelength broadband sound diffusion |
| title_full_unstemmed | Design of Fresnel acoustic reflector for sub-wavelength broadband sound diffusion |
| title_short | Design of Fresnel acoustic reflector for sub-wavelength broadband sound diffusion |
| title_sort | design of fresnel acoustic reflector for sub wavelength broadband sound diffusion |
| topic | Acoustic metasurface Fresnel acoustic reflector Diffuse reflection Parametric optimization Monte-Carlo search Sub-wavelength scale |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524001084 |
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