Acoustic absorption is of particular interest in soundproofing. Soundproofing aims to absorb as much sound energy (often in particular frequencies) as possible converting it into heat or transmitting it away from a certain location.
In general, soft, pliable, or porous materials (like mineral wool serve as good acoustic insulators – absorbing most sound, whereas dense, hard, impenetrable materials (such as dense masonry) reflect most.
See how Lignalite can offer you a solution to your acoustic problems by clicking here. Sound Absorbtion