We kept on telling you about how the more costly solutions might be better. It would seem unfair if we don’t mention a few of them to you.
You will be needing professionals to help you since you will have to open your walls and flooring.
The most effective soundproofing solutions is done by adding more density and mass into your walls, ceilings, and floors, to block and trap the soundwaves from entering.
The usual combination is soundproof insulation materials, acoustic sealants, and new drywall.
There are different types of insulation materials but the best one you should use is batt insulation. These are rectangular panels or rolls made from fiberglass, cotton, or mineral wood.
About installing new soundproof drywall, this may cost you a bit much (we’re looking at more than a hundred bucks). Drywall from QuietRock and National Gypsum are specifically designed with sound insulation in mind.