If you've filed away wallpaper as a dated, old-fashioned interior design reference ... but also help the acoustics of your home? You may want to look into 3D wallpaper and wall coverings.

Univocean 3D Modern Stone Style Rustic Effect Wallpaper ... should be a suitable option to uplift the look of the wall and home decor. With easy removal of stain and dirt, it is easy to maintain.