Application of electronic waste cable sheathing as secondary use sound insulation

Abstract

Cable is the main component of electronic equipment which leads to increasing amounts of hollow sheaths after the removal of cores: metals with insulation layers. The continuously growing dependence on technology makes it more important than ever to reuse electronic waste that outlived its primary function, conserving non-renewable resources and promoting secondary use. Tests were done on different heights of 5 cm, 7 cm, and 10 cm round structures (d = 30 mm) filled with different homogenous sheathings. The sound absorption coefficient measurements done with Kundt Tube were analysed according to length, hardness and number of strands: samples included single-stranded (soft (0.8 mm)); single-stranded (hard (0.6 mm)), double-stranded (hard (0.6 mm)); triple-stranded (soft (0.9 x 0.4 mm) sheaths. The results showed that the single-stranded hard sheathing (0.6 mm) from 1600 Hz to 5000 Hz had the highest absorption values (αs = 0.31 - 0.69), corresponding to sound absorption class C/D.