Parametric acoustic array lensed by a gradient-index phononic crystal
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00350534" target="_blank" >RIV/68407700:21230/21:00350534 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1121/10.0005441" target="_blank" >https://doi.org/10.1121/10.0005441</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1121/10.0005441" target="_blank" >10.1121/10.0005441</a>
Alternative languages
Result language
angličtina
Original language name
Parametric acoustic array lensed by a gradient-index phononic crystal
Original language description
This work presents a theoretical study of a parametric transmitter employing a small ultrasonic transducer and an acoustic lens for the collimation of the non-directional primary ultrasonic waves into a highly-directional beam. The acoustic lens is represented by a gradient-index phononic crystal (GRIN PC) composed of an array of toroidal scatterers. Parameters of the GRIN PC lens are determined employing an optimization procedure that maximizes the minimum value of the primary-wave amplitude over a wide frequency range at a distant point in front of the transducer-lens system. The Westervelt equation is used as a wave equation taking into account diffraction, nonlinearity, and thermoviscous attenuation. The wave equation is solved numerically in the quasi-linear approximation in the frequency domain employing the finite element method. The numerical results show that employing a simple GRIN PC lens, a highly-directional low-frequency beam can be parametrically radiated from a small ultrasonic transducer.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10307 - Acoustics
Result continuities
Project
<a href="/en/project/GA18-24954S" target="_blank" >GA18-24954S: Propagation of acoustic waves through phononic materials and structures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
The Journal of the Acoustical Society of America
ISSN
0001-4966
e-ISSN
1520-8524
Volume of the periodical
149
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
4534-4542
UT code for WoS article
000665105300001
EID of the result in the Scopus database
2-s2.0-85108696832