Noise transmission through active acoustic metamaterials in the negative elasticity regime

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F15%3A00461400" target="_blank" >RIV/61389021:_____/15:00461400 - isvavai.cz</a>

Alternative codes found

RIV/46747885:24220/15:#0003495

Result on the web

<a href="http://dx.doi.org/10.13140/RG.2.1.3320.9361" target="_blank" >http://dx.doi.org/10.13140/RG.2.1.3320.9361</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13140/RG.2.1.3320.9361" target="_blank" >10.13140/RG.2.1.3320.9361</a>

Result language

angličtina

Original language name

Noise transmission through active acoustic metamaterials in the negative elasticity regime

Original language description

Noise pollution has become one of the most deteriorating parameters of the environment. Considerable part of noise is transmitted into interiors of buildings through vibrating large planar structures (e.g. windows). These large planar structures have usually very poor noise–shielding properties due to their low flexural rigidity. Since it is usually difficult to substantially increase the noise shielding properties of large planar structures by conventional (passive) means, the attention of scientists has been focused to the research of active acoustic metamaterials (AAMM) with electronically tunable acoustic impedance. The AAMM are constructed as a composite structure made of a curved glass shell with attached piezoelectric actuators shunted by negative capacitance circuits. This approach offers a method for electronic control of the macroscopic elasticity of the piezoelectric actuators. Recently, a great increase (approximately by 40 dB) in the noise-shielding performance of AAMM has been demonstrated. Therefore, AAMMs represent systems with interesting physical properties offering peculiar acoustic phenomena. In this work, we analyze the noise transmission through AAMM in the regime of negative elasticity using acoustic measurements based on Laser Doppler Vibrometry. The results of the presented methods are yielding a conclusion that the AAMMs have a high application potential in the field of broad frequency range noise isolation, phase shifting of the transmitted sound wave, acoustic cloaking, sound absorption, clarification of transmitted sound, and other related areas.

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2015

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 Sound and Vibration (ICSV22), 2015

ISBN

978-88-88942-48-3

ISSN

2329-3675

e-ISSN

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Number of pages

8

Pages from-to

1117-1125

Publisher name

International Institute of Acoustics and Vibration (IIAV), 2015

Place of publication

Florence

Event location

Florence

Event date

Jul 12, 2015

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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