Abstract
The objectives of the research were: a) to develop a process for recycling carpet waste into an acoustic underlay product; b) to optimise the underlay properties for acoustic performance and mechanical properties; c) to carry out standard acoustical testing including impact sound insulation and airborne transmission loss; d) to conduct a full range of British Standard tests as applied to underlays; e) to carry out a comparative assessment of the performance of the optimised recycled product against commercially available underlays; f) to assess the prospects of scaling up production of the recycled underlay for commercial exploitation.