Made from denim, Bonded Logic's UltraTouch absorbs sound while it insulates.
Acoustical Surfaces' CFAB cellulose panels.
ComfortGuard QT drywall
For floors, Ecore International offers QT Sound Control underlayment.
Green Glue's acoustical sealant.
Temple-Inland's Quiet Brace structural wall sheathing
Roxul's Safe'n'Sound fire and soundproofing insulation.