PUR based waste utilization in technical acoustics

Abstract

There is a lot of waste in industrial production. One of possibilities of the waste materials utilization is their application for the noise and vibration damping. The paper deals with experimental determination of sound absorption coefficient, complex modulus of elasticity, loss factor and transfer function of the soft polyurethane (PUR) composite matrix based samples. The PUR samples were produced with different thickness and different amount of bonding agent. Measurement of the sound absorption coefficient was carried out on B&K 2034 analyzer with Kundt's tube. The complex modulus of elasticity, the loss factor and the transfer function were determined on B&K 2034 analyzer with vibrator.