Acoustic insulation articles and materials, namely, acoustic insulation panels; Architectural acoustic products, namely, sound absorbers and diffusers in the nature of sound-damping ceiling coverings, sound-damping wall coverings and sound-absorbing plates; sound dampening blankets; acoustical insulation barrier panels; acoustic baffles for soundproofing purposes; Architectural acoustic products, namely, sound absorbers and diffusers in the nature of sound-adsorbing ceiling coverings, sound-a...