Why Does Glass Wool Have Sound-absorbing Properties

Glass wool belongs to porous sound-absorbing materials. Due to its open pore structure and rough surface, it has a large number of interconnected small pores and voids inside and outside.

When sound waves are incident on glass wool, they can enter the interior of the material through the pores, causing vibrations of air molecules in the gaps. Due to the viscous air resistance of air and the friction between air molecules and pore walls, namely the surface of glass fibers, sound energy is converted into thermal energy loss, resulting in significant attenuation of sound energy. Therefore, glass wool has good sound absorption performance.