Designing a Directional Acoustic Transmitter

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F16%3APU119069" target="_blank" >RIV/00216305:26220/16:PU119069 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.feec.vutbr.cz/EEICT/2016/sbornik/EEICT-2016-sborn%C3%ADk-komplet.pdf" target="_blank" >http://www.feec.vutbr.cz/EEICT/2016/sbornik/EEICT-2016-sborn%C3%ADk-komplet.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Designing a Directional Acoustic Transmitter

Popis výsledku v původním jazyce

In this paper the parametric transmission of sound through an amplitude-modulated ultrasonic wave, using automatic demodulation in a non-linear environment is discussed. Methods for the processing of the transmitted signal are presented; these techniques employ modified amplitude modulation to suppress the environmental effects, which otherwise distort the signal. A special emphasis is placed on the mathematical instruments describing the parametric sound beam transmission in a non-linear medium. 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 spatial radiation characteristics and through determination of the total harmonic distortion (THD). In order to control the parametric speaker, a digital element comprising a sampler, a transducer of the input transmitted signal, and a microcontroller to preprocess this signal and to facilitate the amplitude modulation of the ultrasonic carrier wave is designed. The applied algorithms were analyzed to establish their computational intensity; such an analysis enabled us to select a microprocessor basis suitable for the implementation of the signal processing algorithms.

Název v anglickém jazyce

Designing a Directional Acoustic Transmitter

Popis výsledku anglicky

In this paper the parametric transmission of sound through an amplitude-modulated ultrasonic wave, using automatic demodulation in a non-linear environment is discussed. Methods for the processing of the transmitted signal are presented; these techniques employ modified amplitude modulation to suppress the environmental effects, which otherwise distort the signal. A special emphasis is placed on the mathematical instruments describing the parametric sound beam transmission in a non-linear medium. 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 spatial radiation characteristics and through determination of the total harmonic distortion (THD). In order to control the parametric speaker, a digital element comprising a sampler, a transducer of the input transmitted signal, and a microcontroller to preprocess this signal and to facilitate the amplitude modulation of the ultrasonic carrier wave is designed. The applied algorithms were analyzed to establish their computational intensity; such an analysis enabled us to select a microprocessor basis suitable for the implementation of the signal processing algorithms.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 22nd Conference STUDENT EEICT 2016

ISBN

978-80-214-5350-0

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

153-156

Název nakladatele

Vysoké učení technické v Brně, Fakulta elektrotechniky a komunikačních

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

28. 4. 2016

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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