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Statements

Subject Item
n2:RIV%2F46747885%3A24220%2F14%3A%230003036%21RIV15-GA0-24220___
rdf:type
skos:Concept n11:Vysledek
rdfs:seeAlso
http://www.acoustics.asn.au/conference_proceedings/INTERNOISE2014/papers/p834.pdf
dcterms:description
Noise pollution has become one of the most serious problems of our society. Considerable part of unpleasant noise is transmitted into the interior of buildings through large vibrating planar structures - windows with poor noise-isolation properties caused by their low flexural rigidity. In this Paper, we demonstrate and analyze a noise shielding using an active acoustic metamaterial (AAMM) with electronically tunable acoustic impedance. The AAMM consists of a curved glass plate with attached piezoelectric Macro-Fiber Composite (MFC) actuators shunted by negative capacitor (NC) circuits. Using this approach, it is possible to electronically control the effective elasticity of the MFC actuators and, therefore, the flexural rigidity of the composite structure of the AAMM. Key features that control the acoustic impedance of the AAMM have been analyzed on a simplified analytical model. Frequency dependence of the acoustic impedance and the acoustic transmission loss through the AAMM are measured and compared. Vibration modes of the AAMM are optically measured using Digital Holographic Interferometry (DHI). Noise pollution has become one of the most serious problems of our society. Considerable part of unpleasant noise is transmitted into the interior of buildings through large vibrating planar structures - windows with poor noise-isolation properties caused by their low flexural rigidity. In this Paper, we demonstrate and analyze a noise shielding using an active acoustic metamaterial (AAMM) with electronically tunable acoustic impedance. The AAMM consists of a curved glass plate with attached piezoelectric Macro-Fiber Composite (MFC) actuators shunted by negative capacitor (NC) circuits. Using this approach, it is possible to electronically control the effective elasticity of the MFC actuators and, therefore, the flexural rigidity of the composite structure of the AAMM. Key features that control the acoustic impedance of the AAMM have been analyzed on a simplified analytical model. Frequency dependence of the acoustic impedance and the acoustic transmission loss through the AAMM are measured and compared. Vibration modes of the AAMM are optically measured using Digital Holographic Interferometry (DHI).
dcterms:title
Noise shielding using active acoustic metamaterials with electronically tunable acoustic impedance Noise shielding using active acoustic metamaterials with electronically tunable acoustic impedance
skos:prefLabel
Noise shielding using active acoustic metamaterials with electronically tunable acoustic impedance Noise shielding using active acoustic metamaterials with electronically tunable acoustic impedance
skos:notation
RIV/46747885:24220/14:#0003036!RIV15-GA0-24220___
n4:aktivita
n5:P
n4:aktivity
P(GA13-10365S)
n4:dodaniDat
n16:2015
n4:domaciTvurceVysledku
n14:1754599 n14:3999793 n14:9828915 n14:7828098 n14:7453663
n4:druhVysledku
n13:D
n4:duvernostUdaju
n20:S
n4:entitaPredkladatele
n15:predkladatel
n4:idSjednocenehoVysledku
32697
n4:idVysledku
RIV/46747885:24220/14:#0003036
n4:jazykVysledku
n10:eng
n4:klicovaSlova
active acoustic metamaterial; noise shielding; acoustic impedance; electronic control
n4:klicoveSlovo
n9:active%20acoustic%20metamaterial n9:electronic%20control n9:acoustic%20impedance n9:noise%20shielding
n4:kontrolniKodProRIV
[DCE9861A6967]
n4:mistoKonaniAkce
Melbourne, Australia
n4:mistoVydani
Melbourne, Australia
n4:nazevZdroje
43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014
n4:obor
n8:JA
n4:pocetDomacichTvurcuVysledku
5
n4:pocetTvurcuVysledku
8
n4:projekt
n17:GA13-10365S
n4:rokUplatneniVysledku
n16:2014
n4:tvurceVysledku
Doleček, Roman Václavík, Jan Steiger, Kateřina Márton, Pavel Černík, Martin Kodejška, Miloš Psota, Pavel Mokrý, Pavel
n4:typAkce
n19:WRD
n4:zahajeniAkce
2014-01-01+01:00
s:numberOfPages
9
n12:hasPublisher
Australian Acoustical Society
n22:isbn
9780909882037
n6:organizacniJednotka
24220