If drywall already exists in the room walls then soundproofing the existing wall without removing the drywall is possible.
Diy soundproof bedroom wall.
Another trick on how to soundproof your bedroom is to install a ceiling mounted drape on one side of the wall preferably where you will be placing the head of your bed.
The easiest strategy is to add a second layer of drywall to build up a thick sound deadening barrier.
Here is a brief guide to get you started.
R 13 fiber insulation you can change it with coconut peat fiber styrofoam solid foam etc that is enough to cover an area as wide as your desired wall with the thickness as thick as the frame.
Protect yourself make sure you are working in a well ventilated area.
The smell can be overpowering and you.
When it comes to heavy brick and stone are great but impractical for retrofitting your interior walls.
Noise proofing compound as acoustical caulk.
Not only does this help reduce the sounds bouncing toward you but it will also create a dramatic ambiance to your sleeping quarters as well.
Deadening those vibrations is best done with heavy dense materials that stop noise in its tracks.
This will reduce the sound coming towards you and create a beautiful feel in your bedroom.
First of all you will need to examine the existing wall to see if there are any gaps that might be causing leakage.
Another way to soundproof a bedroom is by using ceiling mounted drapes.
Check out my guide about the best soundproof curtains.
Full sized caulk gun to apply the noise proofing compound.
Soundproofing wall without removing drywall.