Sound transmission class
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Sound Transmission Class is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and
Sound Transmission Class Report Sample from NTi Audio showing Transmission Loss in the sixteen standard frequencies
A small gap in the wall can greatly reduce the STC rating. This wall did not receive a full perimeter seal.
Drywall
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Drywall is a panel made of calcium sulfate dihydrate, with or without additives, typically extruded between thick sheets of facer and backer paper, used in the construction of interior walls and ceili
Sound transmission class
…E336. However, not all jurisdictions use the IBC for their building or municipal code. Interior walls with 1 sheet of 1⁄2-inch (13 mm) gypsum wallboard (drywall) on either side of 2x4 (1+1⁄2 in × 3+1⁄2 in or 38 mm × 89 mm) wood studs spaced 16 inches (410 mm) on-center with no fiberglass insulation filling each…
Various sized cuts of 1⁄2 in (13 mm) drywall with tools for maintenance and installation
Vertically hung drywall with joint compound
Applying "joint compound" to drywall
Drywall water damage in a closet