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

Result code in 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>

Result on the web

<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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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JA - Electronics and optoelectronics

OECD FORD branch

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Project

<a href="/en/project/GA16-11965S" target="_blank" >GA16-11965S: Adaptive acoustic metasurfaces for the active sound field control</a><br>

Continuities

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

Publication year

2016

Confidentiality

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

Article name in the collection

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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Number of pages

10

Pages from-to

""

Publisher name

Asociación de Acústicos Argentinos

Place of publication

Buenos Aires

Event location

Buenos Aires

Event date

Jan 1, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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