Acoustic properties of loose and consolidated granulates
Keywords:Absorption, Acoustic impedance, Acoustic properties, Composite structures, Foams, Glass, Granular materials, Granulation, Polyvinyl chlorides, Pore size, Porous materials, Vibration control, Absorption coefficients, Acoustic absorbers, Fiberglass, Wavenumbers
AbstractThe acoustic performance of some porous materials made from loose and consolidated granulates was investigated. Loose mixes of granular and fibrous carpet tile waste were used for the this study. It was shown that a thin layer of recycled material can yield relatively high values of absorption coefficient. The results show that for the selected layer thickness the acoustic performance of the recycled carpet granulates is comparable or superior to that observed in the case of fiberglass in the low and medium frequency range.
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