Modeling the Propagation of a Modulated Ultrasonic Wave for Parametric Speaker Design

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F18%3APU128090" target="_blank" >RIV/00216305:26220/18:PU128090 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modeling the Propagation of a Modulated Ultrasonic Wave for Parametric Speaker Design

Popis výsledku v původním jazyce

The present article discusses the possibilities of transmitting and focusing a modulated ultrasonic wave in a nonlinear medium. From a more concrete perspective, the analyzed problem consists in the propagation of an ultrasonic wave in such a medium. The examined subject is connected with mathematical tools related to the Westervelt equation, which describes and models the propagation of ultrasonic waves in the context outlined herein, enabling us to simulate the propagation and focusing of ultrasonic waves in various media. The paper characterizes the Westervelt equation in detail and introduces the mathematical tools that facilitate the numerical solution of the problem. In this context, the first chapter describes the individual parts of the equation, presenting a numerical instrument based on the pseudospectral Fourier collocation method to allow its solution. The second section of the text defines the input parameters and properties of the applied medium for the modeling and propagation of an ultrasonic wave and refers to two types of amplitude modulation in which we investigated the influence on the propagation and distortion of the transmitted sound beam. Within our research, we fabricated a parametric speaker consisting of 50 ultrasonic acoustic transducers with the resonant frequency of 40 kHz. The functionality of the acoustic source was verified via measurement of the total harmonic distortion (THD).The final chapter then summarizes the results and proposes a comparison of the simulations performed.

Název v anglickém jazyce

Modeling the Propagation of a Modulated Ultrasonic Wave for Parametric Speaker Design

Popis výsledku anglicky

The present article discusses the possibilities of transmitting and focusing a modulated ultrasonic wave in a nonlinear medium. From a more concrete perspective, the analyzed problem consists in the propagation of an ultrasonic wave in such a medium. The examined subject is connected with mathematical tools related to the Westervelt equation, which describes and models the propagation of ultrasonic waves in the context outlined herein, enabling us to simulate the propagation and focusing of ultrasonic waves in various media. The paper characterizes the Westervelt equation in detail and introduces the mathematical tools that facilitate the numerical solution of the problem. In this context, the first chapter describes the individual parts of the equation, presenting a numerical instrument based on the pseudospectral Fourier collocation method to allow its solution. The second section of the text defines the input parameters and properties of the applied medium for the modeling and propagation of an ultrasonic wave and refers to two types of amplitude modulation in which we investigated the influence on the propagation and distortion of the transmitted sound beam. Within our research, we fabricated a parametric speaker consisting of 50 ultrasonic acoustic transducers with the resonant frequency of 40 kHz. The functionality of the acoustic source was verified via measurement of the total harmonic distortion (THD).The final chapter then summarizes the results and proposes a comparison of the simulations performed.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20202 - Communication engineering and systems

Projekt

<a href="/cs/project/LO1401" target="_blank" >LO1401: Interdisciplinární výzkum bezdrátových technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

8th International Interdisciplinary PhD Workshop

ISBN

978-83-7663-250-6

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

1-4

Název nakladatele

Neuveden

Místo vydání

Neuveden

Místo konání akce

Swinouscie

Datum konání akce

9. 5. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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