Frequency selective wave beaming in nonreciprocal acoustic phased arrays

Abstract Acoustic phased arrays are capable of steering and focusing a beam of sound via selective coordination of the spatial distribution of phase angles between multiple sound emitters. Constrained by the principle of reciprocity, conventional phased arrays exhibit identical transmission and rece...

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Main Authors: Revant Adlakha, Mohammadreza Moghaddaszadeh, Mohammad A. Attarzadeh, Amjad Aref, Mostafa Nouh
Format: Article
Language:English
Published: Nature Publishing Group 2020-12-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-020-77489-x
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spelling doaj-d11490d847e7460297c9deb45070307c2020-12-08T10:52:58ZengNature Publishing GroupScientific Reports2045-23222020-12-0110111410.1038/s41598-020-77489-xFrequency selective wave beaming in nonreciprocal acoustic phased arraysRevant Adlakha0Mohammadreza Moghaddaszadeh1Mohammad A. Attarzadeh2Amjad Aref3Mostafa Nouh4Department of Mechanical and Aerospace Engineering, University at BuffaloDepartment of Civil, Structural and Environmental Engineering, University at BuffaloDepartment of Mechanical and Aerospace Engineering, University at BuffaloDepartment of Civil, Structural and Environmental Engineering, University at BuffaloDepartment of Mechanical and Aerospace Engineering, University at BuffaloAbstract Acoustic phased arrays are capable of steering and focusing a beam of sound via selective coordination of the spatial distribution of phase angles between multiple sound emitters. Constrained by the principle of reciprocity, conventional phased arrays exhibit identical transmission and reception patterns which limit the scope of their operation. This work presents a controllable space–time acoustic phased array which breaks time-reversal symmetry, and enables phononic transition in both momentum and energy spaces. By leveraging a dynamic phase modulation, the proposed linear phased array is no longer bound by the acoustic reciprocity, and supports asymmetric transmission and reception patterns that can be tuned independently at multiple channels. A foundational framework is developed to characterize and interpret the emergent nonreciprocal phenomena and is later validated against benchmark numerical experiments. The new phased array selectively alters the directional and frequency content of the incident signal and imparts a frequency conversion between different wave fields, which is further analyzed as a function of the imposed modulation. The space–time acoustic phased array enables unprecedented control over sound waves in a variety of applications ranging from ultrasonic imaging to non-destructive testing and underwater SONAR telecommunication.https://doi.org/10.1038/s41598-020-77489-x
collection DOAJ
language English
format Article
sources DOAJ
author Revant Adlakha
Mohammadreza Moghaddaszadeh
Mohammad A. Attarzadeh
Amjad Aref
Mostafa Nouh
spellingShingle Revant Adlakha
Mohammadreza Moghaddaszadeh
Mohammad A. Attarzadeh
Amjad Aref
Mostafa Nouh
Frequency selective wave beaming in nonreciprocal acoustic phased arrays
Scientific Reports
author_facet Revant Adlakha
Mohammadreza Moghaddaszadeh
Mohammad A. Attarzadeh
Amjad Aref
Mostafa Nouh
author_sort Revant Adlakha
title Frequency selective wave beaming in nonreciprocal acoustic phased arrays
title_short Frequency selective wave beaming in nonreciprocal acoustic phased arrays
title_full Frequency selective wave beaming in nonreciprocal acoustic phased arrays
title_fullStr Frequency selective wave beaming in nonreciprocal acoustic phased arrays
title_full_unstemmed Frequency selective wave beaming in nonreciprocal acoustic phased arrays
title_sort frequency selective wave beaming in nonreciprocal acoustic phased arrays
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2020-12-01
description Abstract Acoustic phased arrays are capable of steering and focusing a beam of sound via selective coordination of the spatial distribution of phase angles between multiple sound emitters. Constrained by the principle of reciprocity, conventional phased arrays exhibit identical transmission and reception patterns which limit the scope of their operation. This work presents a controllable space–time acoustic phased array which breaks time-reversal symmetry, and enables phononic transition in both momentum and energy spaces. By leveraging a dynamic phase modulation, the proposed linear phased array is no longer bound by the acoustic reciprocity, and supports asymmetric transmission and reception patterns that can be tuned independently at multiple channels. A foundational framework is developed to characterize and interpret the emergent nonreciprocal phenomena and is later validated against benchmark numerical experiments. The new phased array selectively alters the directional and frequency content of the incident signal and imparts a frequency conversion between different wave fields, which is further analyzed as a function of the imposed modulation. The space–time acoustic phased array enables unprecedented control over sound waves in a variety of applications ranging from ultrasonic imaging to non-destructive testing and underwater SONAR telecommunication.
url https://doi.org/10.1038/s41598-020-77489-x
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