Sound insulation can also be built with protective panels using mineral wool as an insulating material, with additional use of heavy materials such as cement fiber boards and special flexible soundproofing. It is also possible to achieve the acoustic operation of a multilayered structure by forming an insulating board, which is important for preventing the burst of frequency response. It should also be emphasized that sound insulation in such an integral structure, as in this current panel, is extremely complex due to its acoustics and cannot be calculated theoretically.  To determinate the actual sound insulation index of the Rw plate, we would need a laboratory.