To prevent you from being disturbed by the noise in the next room, whether the room is upstairs or in line, the construction has to prevent sound from being transmitted. This doesn’t have to be a massive concrete slab or wall. Soundproofing relates to the overall ability of a building element or building structure to reduce the sound transmission through it.

Yes, insulation helps reduce noise both from outside and between different levels and rooms inside your home. In fact, if outside noises seem louder than they should be, it may be a sign you don't have enough insulation. Loose-fill cellulose and fiberglass insulation are the best types of insulation for sound control.