My house has been decorated. I stayed for a few days and found that there was no sound insulation. What can I do to avoid noise? You can even hear the crackling sound in the next room.

It is hard to live in such a house! Stick a layer of 10 cm thick benzene board on the wall next to the neighbor, then blow putty and paint, which can play a role in sound insulation! Or a short core wall is a wall made of hollow bricks! As long as the cracks in the wall itself are sealed, it will have the effect of sound insulation! Or make a partition wall with a wooden square a few centimeters away from the wall. There's room inside to intercept the transmission of sound! It is the thin wall between neighbors that brings trouble.