Active acoustic metasurface with an array of piezoelectric membranes and local control of acoustic impedance

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F18%3A00572319" target="_blank" >RIV/61389021:_____/18:00572319 - isvavai.cz</a>
Alternative codes found
RIV/46747885:24220/18:00006497
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Active acoustic metasurface with an array of piezoelectric membranes and local control of acoustic impedance
Original language description
It is known that acoustic metasurfaces (AMS) represent powerful tools which can be used for the construction of impedance or phase gratings to control the reflected sound field. The main drawback of AMSs resides in the narrow operational frequency range, which can be avoided using the active control of acoustic impedance of the particular unit cell of the AMS. This can be achieved by introducing the curved piezoelectric membrane shunted by an active electronic circuit as a unit cell of the AMS according to the technique known as the active elasticity control. It is natural that large planar AMSs require the construction of arrays with a large number of actively tuned electroacoustic resonators. This puts considerable requirements on the complexity of the control electronics. In this paper, we introduce a novel concept of the electronic control of the acoustic impedance in the large array of actively tuned electroacoustic resonators by means of the methods of Active Matrix Addressing and Pulse Amplitude Modulation. We demonstrate the applicability of these two methods to control the acoustic properties of AMS by means of numerical simulations.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
25th International Congress on Sound and Vibration
ISBN
9781510868458
ISSN
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e-ISSN
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Number of pages
7
Pages from-to
"Roč. 1 (2018)"
Publisher name
International Institute of Acoustics and Vibration
Place of publication
Auburn
Event location
Hiroshima
Event date
Jul 8, 2018
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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