Noise shielding using active acoustic metamaterials with electronically tunable acoustic impedance

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F14%3A00435326" target="_blank" >RIV/61389021:_____/14:00435326 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Noise shielding using active acoustic metamaterials with electronically tunable acoustic impedance
Original language 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
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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