This thesis explores a novel method for upcycling contaminated   glass waste into sound-absorbing architectural panels, addressing the   challenges of recycling mixed cullet and the demand for sustainable acoustic   materials. Through foaming, low-quality waste like light bulb glass and mixed   cullet was transformed into porous material with sound absorbing properties   comparable to conventional acoustic materials. The research combined   experimental manufacturing (testing different glass types, foaming agents,   and firing schedules) with impedance tube measurements and acoustic   simulations in a case study model of a performance space. Results showed that   porosity, controlled through manufacturing parameters, strongly influences   acoustic performance. To improve structural integrity, a solid float glass   layer was fused to the foam, increasing durability without reducing sound   absorption. Using a computational workflow, the best panel placements were   optimized to reduce excessive early reflections in the case study space. The   project demonstrates that even contaminated glass waste can be turned into   durable, effective acoustic panels, fully made of glass waste and recyclable   again, offering a circular design strategy.