Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve

An acoustic metamaterial based on a fractal structure, the Koch curve, is designed to simultaneously realize slow and fast acoustic waves. Owing to the multiple transmitting paths in the structure resembling the Koch curve, the acoustic waves travelling along different paths interfere with each othe...

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Autores principales: Ding, Jin, Fan, Li, Zhang, Shu-yi, Zhang, Hui, Yu, Wei-wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5784109/
https://www.ncbi.nlm.nih.gov/pubmed/29367721
http://dx.doi.org/10.1038/s41598-018-19797-x
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author Ding, Jin
Fan, Li
Zhang, Shu-yi
Zhang, Hui
Yu, Wei-wei
author_facet Ding, Jin
Fan, Li
Zhang, Shu-yi
Zhang, Hui
Yu, Wei-wei
author_sort Ding, Jin
collection PubMed
description An acoustic metamaterial based on a fractal structure, the Koch curve, is designed to simultaneously realize slow and fast acoustic waves. Owing to the multiple transmitting paths in the structure resembling the Koch curve, the acoustic waves travelling along different paths interfere with each other. Therefore, slow waves are created on the basis of the resonance of a Koch-curve-shaped loop, and meanwhile, fast waves even with negative group velocities are obtained due to the destructive interference of two acoustic waves with opposite phases. Thus, the transmission of acoustic wave can be freely manipulated with the Koch-curve shaped structure.
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spelling pubmed-57841092018-02-07 Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve Ding, Jin Fan, Li Zhang, Shu-yi Zhang, Hui Yu, Wei-wei Sci Rep Article An acoustic metamaterial based on a fractal structure, the Koch curve, is designed to simultaneously realize slow and fast acoustic waves. Owing to the multiple transmitting paths in the structure resembling the Koch curve, the acoustic waves travelling along different paths interfere with each other. Therefore, slow waves are created on the basis of the resonance of a Koch-curve-shaped loop, and meanwhile, fast waves even with negative group velocities are obtained due to the destructive interference of two acoustic waves with opposite phases. Thus, the transmission of acoustic wave can be freely manipulated with the Koch-curve shaped structure. Nature Publishing Group UK 2018-01-24 /pmc/articles/PMC5784109/ /pubmed/29367721 http://dx.doi.org/10.1038/s41598-018-19797-x Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Ding, Jin
Fan, Li
Zhang, Shu-yi
Zhang, Hui
Yu, Wei-wei
Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve
title Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve
title_full Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve
title_fullStr Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve
title_full_unstemmed Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve
title_short Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve
title_sort simultaneous realization of slow and fast acoustic waves using a fractal structure of koch curve
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5784109/
https://www.ncbi.nlm.nih.gov/pubmed/29367721
http://dx.doi.org/10.1038/s41598-018-19797-x
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