Separate Noise Sources Before You Treat Them
Acoustic comfort is built, not installed. Start by identifying noise paths: HVAC, plumbing, footsteps, and airborne sound between rooms. Decouple framing from masonry using resilient channels or clips, and insulate cavities with mineral wool for broadband sound absorption. Use acoustic caulk on all perimeters and outlets to eliminate flanking leaks. Ceiling isolation with double 5/8″ drywall and damping compound boosts STC into the mid-60s—quiet enough for concurrent video calls and playtime.
HVAC and Plumbing Quieting
Line ducts with sound-attenuating insulation and install flexible connectors at air handlers to stop vibration transfer. Choose low-sone diffusers and keep air velocities below 400 fpm for serenity. Wrap waste and supply lines with acoustic pipe wrap, and isolate the ejector pit lid on a gasket to keep pump cycles silent.
Room Treatment and Finishes
After isolation, tune reverberation with soft finishes: fabric panels, wool rugs, upholstered furniture. Hide broadband absorbers behind decorative wood slats or perforated panels for aesthetics. A balance of reflection (wood, glass) and absorption (fabric, carpet) ensures the space feels natural, not dead.
Doors, Transitions, and Layout
Solid-core doors with continuous seals and drop bottoms prevent leakage into stairs and corridors. Offset doors between rooms so sound can’t travel straight through. Add felt gaskets behind trim at wall intersections where flanking often sneaks through.
Get detailed acoustic assemblies and finish suggestions through our NYC basement remodeling planning & materials guide.