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This article demonstrates the acoustic properties of added small amount of carbon-nanotube and siliconoxide nano powder (S-type, P-Type) to the host material polyurethane composition. By adding CNT and/or nano-silica in the form of powder at different concentrations up to 2% within the PU composition to improve the sound absorption were investigated in the frequency range up to 1600Hz. Sound transmission loss measurement of the samples were determined using large impedance tube. The tests showed that addition of 0.2wt.% Silicon Oxide Nano-powder and 0.35wt.% carbon nanotube to polyurethane composition improved sound transmissions loss (Sound Absorption) up to 80dB than that of pure polyurethane foam sample

Acoustic Properties of Polyurethane Composition Reinforced with Carbon Nanotubes and Silicon Oxide Nano-powder