The goal of soundproofing is to limit of the transition of sound from a room (or outside) to adjacent one. It determines which components of a façade, walls, ceilings etc. are important to make their acoustical isolation as good as possible. Soundproofing controls the noise, which is produced by the machines/equipment in a building. Room acoustics on the other hand tasks itself with the sound within a room: no echo, the same sound level everywhere, the same sound colour everywhere, that the room has the right acoustics, that it isn’t too echo-y or too muffled etc.