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  • The aim of the paper is to study the effect of the surface shape and perforation of plastics on sound absorption. Samples with different asperity heights, depths and numbers of holes were prepared by means of CNC milling machine. Experimental measurements of frequency dependencies of the sound absorption coefficient were realized by the transfer function method using Kundt´s impedance tube at normal incidence of acoustic wave on the investigated materials. The study was performed on two types of polyurethanes. Different factors, that have influence on sound absorption, are evaluated in the conclusion of this work. Both investigated materials are also compared in terms of their ability to absorb sound.
  • The aim of the paper is to study the effect of the surface shape and perforation of plastics on sound absorption. Samples with different asperity heights, depths and numbers of holes were prepared by means of CNC milling machine. Experimental measurements of frequency dependencies of the sound absorption coefficient were realized by the transfer function method using Kundt´s impedance tube at normal incidence of acoustic wave on the investigated materials. The study was performed on two types of polyurethanes. Different factors, that have influence on sound absorption, are evaluated in the conclusion of this work. Both investigated materials are also compared in terms of their ability to absorb sound. (en)
Title
  • Influence of surface shape and perforation of plastics on sound absorption
  • Influence of surface shape and perforation of plastics on sound absorption (en)
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  • Influence of surface shape and perforation of plastics on sound absorption
  • Influence of surface shape and perforation of plastics on sound absorption (en)
skos:notation
  • RIV/70883521:28110/14:43872016!RIV15-MSM-28110___
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  • 21629
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  • RIV/70883521:28110/14:43872016
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  • Sound absorption coefficient; Profile; Plastics; Perforation; Excitation frequency; CNC machining; Air gap (en)
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  • CH - Švýcarská konfederace
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  • [2E66311BA584]
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  • Applied Mechanics and Materials
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  • 474
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  • Bílek, Ondřej
  • Vašina, Martin
http://linked.open...ain/vavai/riv/wos
  • 000336074000064
issn
  • 1660-9336
number of pages
http://bibframe.org/vocab/doi
  • 10.4028/www.scientific.net/AMM.474.393
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  • 28110
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