Sound absorption of laminated biopolymer foam and epoxy foam
Biopolymer foam was prepared based on vegetable oil and Polyol Flexible (Epoxy) with commercial Polymethane Polyphenyl Isocyanate (Modified Polymeric-MDI) as laminated foam. The acoustic property of biopolymer foam was examined by impedance tube test according to ASTM E-1050 of sound absorption coef...
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2013
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| நிகழà¯à®¨à®¿à®²à¯ˆ அணà¯à®•à®²à¯: | http://eprints.uthm.edu.my/4824/ http://eprints.uthm.edu.my/4824/1/Sound_Absorption_of_Laminated_Biopolymer.pdf |
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| தொகà¯à®ªà¯à®ªà¯: | Biopolymer foam was prepared based on vegetable oil and Polyol Flexible (Epoxy) with
commercial Polymethane Polyphenyl Isocyanate (Modified Polymeric-MDI) as laminated foam.
The acoustic property of biopolymer foam was examined by impedance tube test according to
ASTM E-1050 of sound absorption coefficient (α). From the result obtain, sample D and sample C
are the best result of sound absorption coefficient (α) for biopolymer foam and epoxy foam with the
value are 0.867 and 0.817 respectively. By using the sound behavior theory, when the thickness is
increase the sound absorption is also increase as same as in this study. The noise reduction
coefficient (NRC) of sample D is 38.26% while for sample C is 37.42%. |
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