Garden Soundproofing
https://bestsoundproofing91.doodlekit.com/blog/entry/5118667/stc-soundproofing-making-use-of-rubber-soundproofing-sound-insulation-to-make-walls-silent
You have a rock band, and also no area to practice. Well, you can practice in your cellar, garage, or bedroom but you reside in a condominium, or a separated house with neighbors crowding you on both sides. What