Interior fittings
Unfortunately, there are only a few technical possibilities to insulate your home so that you hear less noise from the neighbouring side. The noise can best be insulated only at its source. This is where the support of your neighbours would be appropriate.
For walls, a double-shell facing wall made of panels with plastic Teroform? heavy-duty sound-absorbing foils, Terodem? bitumen heavy-duty sound-absorbing foils, sound-insulating sandwich elements, Vibra?Rail sound-absorbing foil of different thicknesses would be effective, regardless of the material, as long as it is heavy. However, the panels should not be directly connected to the wall because of sound transmission. However, this only applies to so-called airborne sound, i.e. loud music etc. There is not much that can be done against impact sound, i.e. sound transmission through stairs, ceilings and walls.
If the noise from the apartment above you can be heard, there are two effective measures that have proven to be effective: In the apartment above you, a footfall sound insulation should be installed, which reduces the level by up to 25 dB depending on the product. In your apartment, hanging the ceiling with plasterboard and combined with heavy foil (in board form) helps, which reduces the level by up to 10 dB.