Which features are included in wall assemblies with acoustic separation?

• A. Slab-to-slab partitions; acoustical caulking at connections
• B. Fire-rated gypsum board; slab-to-slab partitions
• C. Double-layer drywall; resilient channels
• D. Staggered studs; mass loaded vinyl

Answer: (A)

Sound isolation relies on two key principles: a continuous barrier that stops sound from jumping from one side to the other, and airtight joints that prevent air-borne noise from leaking through gaps. Slab-to-slab partitions deliver a continuous boundary by extending from structural slab to structural slab, which minimizes sound flanking through floor and ceiling connections. Acoustical caulking at connections ensures a tight seal around all edges and penetrations, so gaps that would otherwise let sound pass are filled and maintained over time. Together, these features create a more effective acoustic separation than walls that rely on partial connections or unsealed joints.