Sound-insulating panel system ZIPS III-Ultra comprises the ZIPS III-Ultra panels and the finishing plasterboard. Sound-insulating sandwich panels ZIPS III-Ultra have proved to be the most efficient in terms of their thickness/result ratio. They are used to increase the sound insulation of single-layer structures like gypsum, brick and concrete walls, partitions, as well as reinforced concrete floors in the construction and reconstruction of any type of buildings.