Investigation and evaluation of the influence of binder on the sound absorption properties of tyre textile fibre composite panels

Abstract

When performing activities in large rooms, insufficient acoustic comfort is often encountered. Various solutions are applied to improve the acoustic conditions. Suspended ceilings and mineral wool panels are one of the most typical solutions for improving the acoustic comfort of rooms. However, the production of such panels uses natural resources and consumes large amounts of energy. Tyre textile fibre is waste obtained by recycling end-of-life tyres. Together with the binding material, a composite sound absorbing panel would be created, which would be a less polluting alternative to the widely used mineral wool. The aim of this study is to investigate the effect of increasing the amount of binder in the composite on the acoustic properties. The method for determining the sound absorption coefficient is based on the standard method described in the ISO 10534-2 standard. The results of the study showed that with an increase in the amount of binder in the composite from 10 to 50%, the sound absorption in the whole spectrum decreases on average from 4 to 30% (the higher the amount of binder, the more the sound absorption decreased). The obtained results show that the amount of binder in the composite determines the sound absorption capacity of the composite sound absorbing panel.