Experimental Study of The Acoustic Properties of Waste Tire Rubber and Polyester Composite Panels

Abstract This study focuses on conducting an experimental investigation into the acoustic properties of materials fabricated from wasted tire rubber. Initially, waste tire rubber was chopped to achieve a specific size, followed by combining it with polyester. The acoustical characteristics were measured using a four-channel impedance tube in strict accordance with ASTM E 2611-19. Various shapes, including fiber, grain, and powder, are produced by carefully shaping composite waste rubber from tires combined with polyester. Notably, the 5 mm, 10 mm, and 15 mm thicknesses remain constant throughout these geometries. The experimental findings reveal that variations in the thickness and shape of the chopped rubber components significantly influence both the sound absorption coefficient and transmission loss. Rubber with granular form has a better sound absorption coefficient than the other two. Apart from that, the pore size of each sample produced varies with the grain shape and affects the sound absorption value. The larger the pore size, the better the sound absorption value. The sound absorption coefficient increases as the panel thickness increases.