Noise insulation isn't a type of material, it's a construction method. Hanging drywall on resilient channel, staggering 2x4 studs on 2x6 bottom and top plates a

Noise insulation isn't a type of material, it's a construction method. Hanging drywall on resilient channel, staggering 2x4 studs on 2x6 bottom and top plates and weaving insulation between them, solid doors, and dual/triple pane windows are all examples of this.