100 years of piezoelectric materials in acoustics: From a sonar to active metasurfaces

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F16%3A00003932" target="_blank" >RIV/46747885:24220/16:00003932 - isvavai.cz</a>

Výsledek na webu

<a href="http://ica2016.org.ar/website/wp-content/uploads/ICA2016_Proceedings.pdf" target="_blank" >http://ica2016.org.ar/website/wp-content/uploads/ICA2016_Proceedings.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

100 years of piezoelectric materials in acoustics: From a sonar to active metasurfaces

Popis výsledku v původním jazyce

Since the discovery of the quartz ultrasound generator by Paul Langevin in 1917, piezoelectric materials has been successfully applied to many acoustic devices, which have greatly improved our lives. Nowadays, the piezoelectric transducers can employ a vast set of piezoelectric materials such as single crystals, ceramics, polymers, biopolymers, macro fiber composites, ferroelectrets, flexoelectric materials and some others. In this Paper, a brief review of the use of piezoelectric materials in electroacoustic transducers will be given. Emphasis will be put on the modern applications of piezoelectric materials to the acoustics, especially on the method of active control of their elastic properties by means of active shunt circuits. The recent application of this method allowed the construction of so called active acoustic metamaterials (AAMM) and metasurfaces. The AAMMs based on the piezoelectric transducers offer the fabrication of efficient sound shielding structures with a low weight, a large area and a small thickness compared to the wavelength of a sound wave. It is evident that such sound-isolation structures may be applicable in devices with severely restricted weight constraints. It has been recently discovered that the great sound isolation efficiency of the AAMM is obtained in the regime of a negative acoustic impedance. Stability of the AAMM operating in the regime of a negative acoustic impedance will be analyzed and discussed.

Název v anglickém jazyce

100 years of piezoelectric materials in acoustics: From a sonar to active metasurfaces

Popis výsledku anglicky

Since the discovery of the quartz ultrasound generator by Paul Langevin in 1917, piezoelectric materials has been successfully applied to many acoustic devices, which have greatly improved our lives. Nowadays, the piezoelectric transducers can employ a vast set of piezoelectric materials such as single crystals, ceramics, polymers, biopolymers, macro fiber composites, ferroelectrets, flexoelectric materials and some others. In this Paper, a brief review of the use of piezoelectric materials in electroacoustic transducers will be given. Emphasis will be put on the modern applications of piezoelectric materials to the acoustics, especially on the method of active control of their elastic properties by means of active shunt circuits. The recent application of this method allowed the construction of so called active acoustic metamaterials (AAMM) and metasurfaces. The AAMMs based on the piezoelectric transducers offer the fabrication of efficient sound shielding structures with a low weight, a large area and a small thickness compared to the wavelength of a sound wave. It is evident that such sound-isolation structures may be applicable in devices with severely restricted weight constraints. It has been recently discovered that the great sound isolation efficiency of the AAMM is obtained in the regime of a negative acoustic impedance. Stability of the AAMM operating in the regime of a negative acoustic impedance will be analyzed and discussed.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/GA16-11965S" target="_blank" >GA16-11965S: Adaptivní akustické metapovrchy pro aktivní řízení zvukového pole</a><br>

Návaznosti

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

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 International Congress on Acoustics

ISBN

978-987-24713-6-1

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

""

Název nakladatele

Asociación de Acústicos Argentinos

Místo vydání

Buenos Aires

Místo konání akce

Buenos Aires

Datum konání akce

1. 1. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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