Acoustic insulating barrier panels made from non-metallic materials; acoustic insulation articles and materials, namely, sound absorbers and diffusers; acoustic insulation and barrier articles and materials, namely, sound absorbers and diffusers; acoustical insulation barriers for protection against sound; foam sheeting for use in sound insulation for buildings; acoustic sheets, namely, sound absorbers and diffusers in the form of insulating barrier panels; expanded closed cell rubber for sou...