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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20202 - Communication engineering and systems

Project

<a href="/en/project/LO1401" target="_blank" >LO1401: Interdisciplinary Research of Wireless Technologies</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Article name in the collection

8th International Interdisciplinary PhD Workshop

ISBN

978-83-7663-250-6

ISSN

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e-ISSN

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Number of pages

4

Pages from-to

1-4

Publisher name

Neuveden

Place of publication

Neuveden

Event location

Swinouscie

Event date

May 9, 2018

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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