ABSTRACT
The case is different with porous materials. For thermal insulation the best ones have a closed pore structure, such as polystyrene, but these would be useless for acoustic absorption, where an open pore structure is best.
The case is different with porous materials. For thermal insulation the best ones have a closed pore structure, such as polystyrene, but these would be useless for acoustic absorption, where an open pore structure is best.