... The Quiet Living system is the same width as the standard internal wall, meaning that standard doorjambs and window frames can be used. ... www.homeimprovementpages.com.au/article/Soundproof_Your_Home_With_Plasterboard
... The two sides and the top are referred to as jambs. The frame is manufactured and the door can
be pre-hung in the frame for ease of installation. ... www.homeimprovementpages.com.au/article/door_frames