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Soundproofing materials; acoustical insulation for buildings; acoustical insulation barrier panels; acoustic insulation board for ceilings; acoustic insulants, namely acoustic insulators; sound-damping ceiling coverings in the form of sound dampening blankets; non-metallic insulation structures for noise abatement, namely, sound absorbers and diffusers in the form of decorative display panels composed primarily of non-metal materials which function to control sound; non-metallic soundproofing structures for noise absorption, namely, sound barrier panels for use in rooms and halls