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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/46747885:24220/18:00006497

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

25th International Congress on Sound and Vibration

ISBN

9781510868458

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

"Roč. 1 (2018)"

Název nakladatele

International Institute of Acoustics and Vibration

Místo vydání

Auburn

Místo konání akce

Hiroshima

Datum konání akce

8. 7. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—