Sound absorption of recycled plastic material

Abstract

In this paper an empirical model to predict the acoustic properties of materials, recycled plastics and polyurethane resins as a binder is developed. The parameters of model were determined on the basis of samples of thicknesses from 10 mm to 50 mm. Measurement of the sound absorption coefficient was performed in an impedance tube - Transfer function method (SRPS EN ISO 10534-2:2008). In order to form an empirical model, on the same samples was carried out measuring the resistance of the air flow according to the method SRPS ISO 9053:1994.