Investigation of Acoustic Material Properties of Neem Wood Powder and Glass Wool Materials

Abstract

The specimens of neem wood and waste wood powder were prepared in a constant 35 mm diameter but with various thickness values ranging from 25 to 35 mm for testing. The material was initially mixed to produce coarse fibres and then processed in a grinding machine to produce fine fibres. Two samples sample specimen’s diameters of 35 mm and thickness (45 mm and 80 mm) were prepared by glass wool. The sample specimens test was conducted by using two microphones-transfer function method. By using Alfa-X software we obtain parameters by providing real part and imaginary part readings of respective samples. the randomly distributed glass fibers create a porous structure that effectively traps and dissipates sound energy. This results in a high Sound Absorption Coefficient (SAC), indicating significant sound absorption capability. The porous nature of the Neem wood powder structure allows sound waves to penetrate and get trapped within the material, reducing sound reflections. The specific Sound Absorption Coefficient (SAC) values will depend on the characteristics of the wood powder used.