This research focuses on the enhancement of acoustic absorption coefficient (α) with a broadband frequency response of a styrene butadiene rubber (SBR) blended with a reclaimed rubber (RR) (SBR/RR foam) composites by increasing the number of microstructure open cells using an inorganic chemical blowing agent (sodium bicarbonate). The effect of various compositions between RR and virgin SBR on the Physicomechanical properties was investigated as well. The results obtained clearly demonstrate that all sample