Investigation of the Six Composites Based on Magnesium Sulfate as Acoustic Absorber Material

A number of manuscripts reveal that Magnesium Sulfate is the primary substance that causes the absorption of sound in sea water. The aim of the investigation is producing an acoustical composite based on Magnesium Sulfate as building material component for absorbing noise. Six kinds of composite were investigated in their acoustic properties for absorbing noise. The method was conducted by fabricating and characterizing six kinds of samples to know their chemical and physical properties by using FTIR and Impedance Tube. Each investigated composite is: MgSO4, Paper waste, Polyvinyl Acetate (PVAc), and Cement; MgSO4, Paper waste, and Cement; MgSO4, Paper waste, Bentonite, and Cement; MgSO4, Glass Wool, Bentonite, and Cement; MgSO4, Glass Wool, PVAc, and Cement; then, MgSO4, Glass Wool, and Cement. The results show that the composite consists of MgSO4, Paper waste, PVAc and Cement has highest sound absorption coefficient (alpha in the range 350 Hz 800 Hz.