Layered assemblies (e.g. drywall/fiberglass/drywall) work best for stopping mid-range and high-pitched sounds, but for stopping low frequency noise (e.g. home t

Layered assemblies (e.g. drywall/fiberglass/drywall) work best for stopping mid-range and high-pitched sounds, but for stopping low frequency noise (e.g. home theater bass) the only solution is mass and a lot of it.