Building enough of these types of sound absorbing panels can make an incredible difference to.
How to make sound deadening wall panels.
The video includes list of tools and materials for the panels.
Time to hang the sound absorption panels onto the wall hanging sound absorption panels onto the wall.
Make an acoustic panel using 1 x4 strapping to make 2 x4 frames for 2 x4 roxul batts.
Deadening those vibrations is best done with heavy dense materials that stop noise in its tracks.
Insert the batt into the frame and cover with weed barrier fabric.
Depending on your space and the level of noise a few bookshelves could resolve your issue.
When it comes to heavy brick and stone are great but impractical for retrofitting your interior walls.
You can hang them up like you would hang a picture frame.
Latex paint is the best paint to use to absorb sound.
A middle 1 x3 strap and corner blocks were added to stiffen the frame and to support the batt.
The solution to your sound problem might also solve your space problem.
Then fill the holes and repaint.
Using a good insulating material like cellulose will help but it can be hard to insert the material into the wall.
Then fill them with your favorite books souvenirs storage baskets and plants.
Add bookshelves around problematic walls in your home.