If your trying to sleep better start with a white or pink noise generator to block out the noise that is keeping you awake. Most get used to white or pink noise very quickly. If that does't work then start adding heavy drapes, cloth wall hangings and rugs on the floor. A lot of sound is transmitted through the attic so if it's next thing to fix if simple work on the windows and walls doesn't work.
If your trying to maintain the privacy of energetic love making that bounces the bed against the walls and one or more of you is a screamer you have an expensive problem and you all will have to restrain yourselves a bit. The wall banging and screaming have to stop. If you rent there is little more you can do other than gags, oil the bed springs or use a futon on the floor.
If you own the home there is lot you can do depending oh the depth of your purse. You not only need to double stud the walls with off set studs that break the connection with the opposite wall and at least use one layer if not 2 layers of 5/8 inch SoundBreak XP Gypsum Board purple drywall on the bed room walls and put some kind of sound deadening insulation between the wall and in a dropped ceiling of acoustic tiles.
The floor transmits low frequency noise. (Think of the cars driving by with the sub-wolfer set on kill.) This page shows how the pros build a floor that is disconnected form the homes floor. The most extreme measure is to set 4 18 pt 24 inch waterproof pipes to deep enough to support pillars that support the floor and the load on floor in the pipes filled with dry sand. Somewhere along the it would have been less expensive to build a detached soundproof room and made it a safe room at the same time..