how to soundproof a room with blankets
1 Soundproof Blankets â If you are not concerned with the aesthetics of your method soundproofing a room, soundproof curtains can be hung on your walls temporarily to help block sound and increase your STC rating. 2  Acoustic blankets can reduce the level of noise in your room up to 21dB.oundproofing a room is as simple as creating a sound blocking gap between your walls and the source of the noise. There are a number of soundproofing materials on the market that achieve this goal effectively.