Parametric array as a source of audible signal

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F16%3APU121072" target="_blank" >RIV/00216305:26220/16:PU121072 - isvavai.cz</a>
Result on the web
<a href="http://ieeexplore.ieee.org/document/7735384/" target="_blank" >http://ieeexplore.ieee.org/document/7735384/</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/PIERS.2016.7735384" target="_blank" >10.1109/PIERS.2016.7735384</a>

Result language
angličtina
Original language name
Parametric array as a source of audible signal
Original language description
This paper discusses the parametric transmission of sound through an amplitude-modulated ultrasonic wave, using automatic demodulation in a non-linear environment. 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.
Czech name
—
Czech description
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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)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
2016 Progress In Electromagnetics Research Symposium (PIERS)
ISBN
978-1-5090-6093-1
ISSN
—
e-ISSN
—
Number of pages
5
Pages from-to
3610-3614
Publisher name
Institute of Electrical and Electronics Engineers, Inc.
Place of publication
Shanghai, China
Event location
Shanghai
Event date
Aug 8, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000400013903074

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