17 Acoustic insulating boards for buildings; sound insulating ceiling panels and partitions, including decorative panels and partitions; acoustic insulating panels, tiles, screens and boards; acoustic insulating materials, including insulating fabrics, plastics and felts; non-metallic sound-insulating materials; materials for acoustic insulation; sound absorbing materials; sound absorbing wall, floor and ceiling coverings; fabrics for acoustic insulation; acoustic insulation systems and kits for interior use; non-metallic sound-insulating products; parts, fittings and accessories for all the foregoing goods.