000			01394nam a2200193Ia 4500
008			220216s9999 xx 000 0 und d
100			_aSuhawati I
245		0	_aSound absorption analysis of foamed rubber composites from kenaf and calsium carbonate
260			_bJournal of Rubber Research _c2013
300			_a36-44
520			_aSound absorption is any means of reducing the sound pressure by converting its energy into hear within a material. The types of sound absorbing materials determine the frequency distribution of niose to be absorbed.Rubber composites as sound insulators were prepared by incorporation of two types of fillers, namely kenafe and calsium carbonate in blends of 50 mole;epoxidised natural rubber (ENR 50) and methyl methacrylate (MMA)- grafted natural rubber latex. A two microphone impedance tube was used to investigate the sound absorption coefficient value of the composites prepared. Rubber composites exhibited excellent sound absorption properties with sound absorption coefficient value of the composite. The presence of calcium carbonate that was scattered on the walls of voids had increased stiffness of the composite, providing better absorption of sound waves.
650			_aAbsorption coefficient
650			_aNR latex
650			_aSound insulation
700			_aIsmaliza I
700			_aKamarudin A M
700			_aShamsul K
942			_cJS
999			_c69065 _d69065