Roohalah Hajizadeh1, Ali Khavanin2,*, Mohammad Barmar3, Ahmad Jonidi Jafari4, Somayeh Farhang Dehghan5
Sound & Vibration, Vol.53, No.5, pp. 207-222, 2019, DOI:10.32604/sv.2019.06523
Abstract Polyurethane foam as the most well-known absorbent materials has a
suitable absorption coefficient only within a limited frequency range. The aim
of this study was to improve the sound absorption coefficient of flexible polyurethane
(PU) foam within the range of various frequencies using clay nanoparticles,
polyacrylonitrile nanofibers, and polyvinylidene fluoride nanofibers. The
response surface method was used to determine the effect of addition of nanofi-
bers of PAN and PVDF, addition of clay nanoparticles, absorbent thickness,
and air gap on the sound absorption coefficient of flexible polyurethane foam
(PU) across different frequency ranges. The absorption… More >
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