QuietZone Wall Framing is made of two sections of Trus Joist MacMillan's TimberStrand LSL engineered wood connected by acoustically resilient metal clips. The Acoustic Floor Mat is placed between the subfloor and an overlayment to create an isolation layer between floors. It deadens the sound of heavy equipment like washing machines and foot traffic. The company's QuietZone Acoustic Caulk is a premium, nondrying, nonhardening, acrylic-based caulk. It is used to fill gaps between wall stud plates, around electrical outlets and opening surrounding air ducts.
Sound comes through doors, windows and any opening in the walls.
Hollow doors create miniature echo chambers, so changing interior doors from hollow to solid core dampens sound transmission from room to room. But just adding a solid core door doesn't do the job. The tighter the fit, the better. Doorjambs should be straight and true. The gap between the door and floor should be as small as possible.