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Statements

Subject Item
n2:RIV%2F70883521%3A28110%2F10%3A63509246%21RIV11-MSM-28110___
rdf:type
n15:Vysledek skos:Concept
dcterms:description
Open cell polyurethane (PUR) foams (Gumotex, Břeclav, Czech Republic) of varying pore size distribution were tested for sound damping in the perpendicular incident sound wave geometry by means of Kundt´s tube measurements in the frequency range of 50-6400 Hz. Tested samples were modified by coating the top layer by nano non-woven fabric of PUR bases (SPUR, Zlin, Czech Republic) produced by means of Nanospider technology (ELMARCO, Liberec, Czech Republic) having varying air flow resistivity. Acoustic reactance of porous insulating materials is determined by layer thickness and in the lesser extent by surface density of the air permeable surface film coating. Acoustic resistance of the porous insulating material is determined by the air flow resistivity. This study allow to characterize the effect of the mutual influence of acoustic resistance and acoustic reactance components of the complex acoustic impedance on final sound damping characteristics of the studied sandwich like PUR based structures. Open cell polyurethane (PUR) foams (Gumotex, Břeclav, Czech Republic) of varying pore size distribution were tested for sound damping in the perpendicular incident sound wave geometry by means of Kundt´s tube measurements in the frequency range of 50-6400 Hz. Tested samples were modified by coating the top layer by nano non-woven fabric of PUR bases (SPUR, Zlin, Czech Republic) produced by means of Nanospider technology (ELMARCO, Liberec, Czech Republic) having varying air flow resistivity. Acoustic reactance of porous insulating materials is determined by layer thickness and in the lesser extent by surface density of the air permeable surface film coating. Acoustic resistance of the porous insulating material is determined by the air flow resistivity. This study allow to characterize the effect of the mutual influence of acoustic resistance and acoustic reactance components of the complex acoustic impedance on final sound damping characteristics of the studied sandwich like PUR based structures.
dcterms:title
Sound damping properties of PUR/nano fabric sandwich structures Sound damping properties of PUR/nano fabric sandwich structures
skos:prefLabel
Sound damping properties of PUR/nano fabric sandwich structures Sound damping properties of PUR/nano fabric sandwich structures
skos:notation
RIV/70883521:28110/10:63509246!RIV11-MSM-28110___
n3:aktivita
n12:Z n12:I
n3:aktivity
I, Z(MSM7088352101)
n3:cisloPeriodika
20
n3:dodaniDat
n8:2011
n3:domaciTvurceVysledku
n10:8668965 n10:3272133 n10:5098955 n10:1273973 n10:1836595
n3:druhVysledku
n16:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
288862
n3:idVysledku
RIV/70883521:28110/10:63509246
n3:jazykVysledku
n5:eng
n3:klicovaSlova
Polyurethanes; PUR; nano-fabric; sound absorption coefficient; acoustic impedance.
n3:klicoveSlovo
n4:nano-fabric n4:PUR n4:sound%20absorption%20coefficient n4:acoustic%20impedance. n4:Polyurethanes
n3:kodStatuVydavatele
SK - Slovenská republika
n3:kontrolniKodProRIV
[489C69E6BB3D]
n3:nazevZdroje
Acta Avionica
n3:obor
n14:BI
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
6
n3:rokUplatneniVysledku
n8:2010
n3:svazekPeriodika
12
n3:tvurceVysledku
Fojtů, Dušan Lapčíková, Barbora Horoshenkov, Kirill Vašina, Martin Studýnka, Vojtěch Lapčík, Lubomír
n3:zamer
n18:MSM7088352101
s:issn
1335-9479
s:numberOfPages
6
n11:organizacniJednotka
28110