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Models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption
Taking as bioinspiration the remarkable acoustic absorption properties of moth wings, we develop a simple analytical model that describes the interaction between acoustic pressure fields, and thin elastic plates incorporating resonant sub-structures. The moth wing is an exemplar of a natural acousti...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9548399/ https://www.ncbi.nlm.nih.gov/pubmed/36209814 http://dx.doi.org/10.1098/rsta.2022.0005 |
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author | Wang, Yao-Ting Shen, Zhiyuan Neil, Thomas R. Holderied, Marc W. Skelton, Elizabeth A. Craster, Richard V. |
author_facet | Wang, Yao-Ting Shen, Zhiyuan Neil, Thomas R. Holderied, Marc W. Skelton, Elizabeth A. Craster, Richard V. |
author_sort | Wang, Yao-Ting |
collection | PubMed |
description | Taking as bioinspiration the remarkable acoustic absorption properties of moth wings, we develop a simple analytical model that describes the interaction between acoustic pressure fields, and thin elastic plates incorporating resonant sub-structures. The moth wing is an exemplar of a natural acoustic metamaterial; the wings are deeply subwavelength in thickness at the frequencies of interest, the absorption is broadband and the tiny scales resonate on the moth wing acting in concert. The simplified model incorporates only the essential physics and the scales are idealized to flat rigid rectangular plates coupled via a spring to an elastic plate that forms the wing; all the components are deep-subwavelength at desired frequencies. Based on Fourier analysis, complemented by phenomenological modelling, our theory shows excellent agreement with simulation mimicking the moth-wing structure. Moth wings operate as broadband sound absorbers employing a range of scale sizes. We demonstrate that a random distribution of scale sizes generates a broadband absorption spectrum. To further illustrate the potential of the model, we design a deeply sub-wavelength acoustic counterpart of electromagnetically induced reflectance. This article is part of the theme issue ‘Wave generation and transmission in multi-scale complex media and structured metamaterials (part 2)’. |
format | Online Article Text |
id | pubmed-9548399 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-95483992022-10-11 Models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption Wang, Yao-Ting Shen, Zhiyuan Neil, Thomas R. Holderied, Marc W. Skelton, Elizabeth A. Craster, Richard V. Philos Trans A Math Phys Eng Sci Articles Taking as bioinspiration the remarkable acoustic absorption properties of moth wings, we develop a simple analytical model that describes the interaction between acoustic pressure fields, and thin elastic plates incorporating resonant sub-structures. The moth wing is an exemplar of a natural acoustic metamaterial; the wings are deeply subwavelength in thickness at the frequencies of interest, the absorption is broadband and the tiny scales resonate on the moth wing acting in concert. The simplified model incorporates only the essential physics and the scales are idealized to flat rigid rectangular plates coupled via a spring to an elastic plate that forms the wing; all the components are deep-subwavelength at desired frequencies. Based on Fourier analysis, complemented by phenomenological modelling, our theory shows excellent agreement with simulation mimicking the moth-wing structure. Moth wings operate as broadband sound absorbers employing a range of scale sizes. We demonstrate that a random distribution of scale sizes generates a broadband absorption spectrum. To further illustrate the potential of the model, we design a deeply sub-wavelength acoustic counterpart of electromagnetically induced reflectance. This article is part of the theme issue ‘Wave generation and transmission in multi-scale complex media and structured metamaterials (part 2)’. The Royal Society 2022-11-28 2022-10-10 /pmc/articles/PMC9548399/ /pubmed/36209814 http://dx.doi.org/10.1098/rsta.2022.0005 Text en © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Articles Wang, Yao-Ting Shen, Zhiyuan Neil, Thomas R. Holderied, Marc W. Skelton, Elizabeth A. Craster, Richard V. Models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption |
title | Models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption |
title_full | Models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption |
title_fullStr | Models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption |
title_full_unstemmed | Models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption |
title_short | Models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption |
title_sort | models for resonant acoustic metasurfaces with application to moth wing ultrasound absorption |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9548399/ https://www.ncbi.nlm.nih.gov/pubmed/36209814 http://dx.doi.org/10.1098/rsta.2022.0005 |
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