Non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium

Non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium

Abstract A rapidly modulated stratified medium with a large mass density modulation depth (LMMD) is proposed to achieve non-diffraction propagation (NDP) of acoustic waves. It is found that the NDP in LMMD medium is independent of the incident angle and can be operated in a broad-band manner. Such a...

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Autores principales: Xing-Feng Zhu, Qi Wei, Ying Cheng, Da-Jian Wu, Xiao-Jun Liu
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
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Acceso en línea:https://doaj.org/article/da329d5149cf4f87ac84427aa28017bc
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spelling oai:doaj.org-article:da329d5149cf4f87ac84427aa28017bc2021-12-02T12:31:52ZNon-diffraction propagation of acoustic waves in a rapidly modulated stratified medium10.1038/s41598-017-08750-z2045-2322https://doaj.org/article/da329d5149cf4f87ac84427aa28017bc2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08750-zhttps://doaj.org/toc/2045-2322Abstract A rapidly modulated stratified medium with a large mass density modulation depth (LMMD) is proposed to achieve non-diffraction propagation (NDP) of acoustic waves. It is found that the NDP in LMMD medium is independent of the incident angle and can be operated in a broad-band manner. Such an NDP is robust and is unhampered by medium losses. An effective medium theory (EMT) is developed for acoustic waves propagating in the LMMD medium based on the first-principles method. The LMMD EMT is verified by using the transfer-matrix method (TMM) for both propagating and evanescent waves. Furthermore, we discuss the influence of the geometry on NDP, and finite element simulations are conducted to verify the NDP in the LMMD medium.Xing-Feng ZhuQi WeiYing ChengDa-Jian WuXiao-Jun LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Xing-Feng Zhu
Qi Wei
Ying Cheng
Da-Jian Wu
Xiao-Jun Liu
Non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium
description Abstract A rapidly modulated stratified medium with a large mass density modulation depth (LMMD) is proposed to achieve non-diffraction propagation (NDP) of acoustic waves. It is found that the NDP in LMMD medium is independent of the incident angle and can be operated in a broad-band manner. Such an NDP is robust and is unhampered by medium losses. An effective medium theory (EMT) is developed for acoustic waves propagating in the LMMD medium based on the first-principles method. The LMMD EMT is verified by using the transfer-matrix method (TMM) for both propagating and evanescent waves. Furthermore, we discuss the influence of the geometry on NDP, and finite element simulations are conducted to verify the NDP in the LMMD medium.
format article
author Xing-Feng Zhu
Qi Wei
Ying Cheng
Da-Jian Wu
Xiao-Jun Liu
author_facet Xing-Feng Zhu
Qi Wei
Ying Cheng
Da-Jian Wu
Xiao-Jun Liu
author_sort Xing-Feng Zhu
title Non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium
title_short Non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium
title_full Non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium
title_fullStr Non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium
title_full_unstemmed Non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium
title_sort non-diffraction propagation of acoustic waves in a rapidly modulated stratified medium
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/da329d5149cf4f87ac84427aa28017bc
work_keys_str_mv AT xingfengzhu nondiffractionpropagationofacousticwavesinarapidlymodulatedstratifiedmedium
AT qiwei nondiffractionpropagationofacousticwavesinarapidlymodulatedstratifiedmedium
AT yingcheng nondiffractionpropagationofacousticwavesinarapidlymodulatedstratifiedmedium
AT dajianwu nondiffractionpropagationofacousticwavesinarapidlymodulatedstratifiedmedium
AT xiaojunliu nondiffractionpropagationofacousticwavesinarapidlymodulatedstratifiedmedium
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