Impact sound insulation and viscoelastic properties of underlay manufactured from recycled carpet waste

Acoustical performance of porous absorber made from recycled rubber and polyurethane resin

“…In previous work, the works of Maderuelo et al (2011) and Rushforth et al (2005) demonstrated that elastomeric waste, called ground tyre rubber, can be recycled into acoustical underlay products that can adequately compete with commercially available acoustical products and, in some cases, having better performance than conventional layers in terms of their acoustical properties. Those types of samples have been tested as a new sound absorber, using recycled rubber particles with different proportion of binder.…”

“…In the case of impact sound insulation, the works of Maderuelo et al (2011) and Rushforth et al (2005) showed that the underlays, made from recycled rubber fluff or produced using the optimum grain/fibre ratio, respectively, presented excellent sound insulation performance in impact loading comparables with some commercial products.…”

Insertion loss prediction of floating floors used in ship cabins

“…Davern [3] carried out measurements of impact noise on two timber floors with vinyl floor coverings on resilient underlays. Rushforth et al [4] reported an investigation of impact sound insulation and viscoelastic properties of underlay manufactured from recycled carpet waste. Basic concept and mathematical model for floating floor may be found in the book by Cremer and Heckl [5].…”

Characterization of polyurethan skin agglomerates for acoustic insulation from impact noise

“…Some of these materials use various residues, such as carpet fibres 12 , elastomers 10,13 and polymers discarded by the footwear industry 14,15 . PU skin is a material that possesses a flexible cellular nucleus (foam) coated with a smooth superficial non-porous skin 1 mm to 5 mm thick which protects the interior of the material against mechanical loads 3 .…”