Today much importance is given to the acoustical environment. This work investigates the acoustic properties of porous concretes made from scoria by showing the influence of physical prosperities of materials like material thickness, density, and porosity on their absorption behaviors. The high absorption achieved in some frequency bands, depending on the concrete dosage, confirmed the possibility of using lightweight structural slag and insulating materials for custom acoustic interventions. Finally, results show the good coefficient absorption capability of scoria, making them a promising alternative to traditional porous concrete solutions.