Garden Soundproofing

https://www.storeboard.com/blogs/general/stc-soundproofing-using-rubber-soundproofing-noise-insulation-to-make-walls-quiet/967322

You have a rock band, and also no place to exercise. Well, you can practice in your cellar, garage, or bed room but you stay in a condo, or a separated home with next-door neighbors crowding you on both sides.