Bio-waste-based sequin fabrics to control interior noise pollution

This research idea is based on the energy dissipation of sound waves through the inter/intra-structural spaces of the raised surface patterns on the woven cotton fabrics in order to achieve an eco-friendly acoustic material affordable for the public using abundant and cheap precursors via accessible, cost-effective, safe, and clean methods. The first idea is decorating the fabrics with bio-waste-based biomaterials with the use of three different size fish scales. Remarkable enhanced control on sound pollution more than four times (333%) on average over a wide frequency range (63–6400 Hz), reaching about 9.5 and 11 times at frequencies of 3000 and 4000, and up to an 85–100% reduction in sound pollution over frequency ranges of 2000–4000 Hz were recorded in a consistent trend with the fish scale morphologies. Rewarding numerous advantages of this clean production technique, the creation of seven patterns designed with the use of sequins is also investigated. One of the seven designed patterns is a bioinspired design imitating the fish scale pattern as a biomimetic design. This investigation revealed the effect of combining the change in direction of sequins sewn on the surface of the fabric in both circular (C.A.) and radial designs. In this way, by creating the appropriate patterns on the fabric, the average sound absorption coefficient increased by more than four times (330%) as compared to the control over a wide frequency range (63–6400 Hz), reaching more than 8 times enhancement at some frequencies, e.g., 500 Hz for C.A.