Noise transmission through active acoustic metamaterials in the negative elasticity regime

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/46747885:24220/15:#0003495

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Noise transmission through active acoustic metamaterials in the negative elasticity regime

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Noise transmission through active acoustic metamaterials in the negative elasticity regime

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2015

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 Sound and Vibration (ICSV22), 2015

ISBN

978-88-88942-48-3

ISSN

2329-3675

e-ISSN

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Počet stran výsledku

8

Strana od-do

1117-1125

Název nakladatele

International Institute of Acoustics and Vibration (IIAV), 2015

Místo vydání

Florence

Místo konání akce

Florence

Datum konání akce

12. 7. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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