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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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