When Soundproofing a wall, one place you can't forget to soundproofing are the electrical outlets. The interior walls are typically not insulated, and the holes in the electrical boxes will easily let noise pass freely between rooms. You will need to seal around the electrical outlets using acoustic caulking for best results. You can also use putty pads around the electrical boxes if the outside wall is unfinished.
#noisereduction #soundproofing #soundproof #noise #noisyneighbors #diy #budgetdiy #cheapdiy #caulking