Contract door leaves

The use of sound-proof doors in buildings is intended to prevent propagation of sound, both from the inside – in the rooms with special requirements to sound proofing due to confidential character of what happens inside the rooms, and into the building – for example, entrance doors. Together with the floor, walls and ceiling the door in this case is another element of sound insulation. Sound proofing parameters of tested door (Rw,P) are marked in decibel (dB), they are analyzed in laboratory environment and set 5dB higher than those required at the construction site.