Garden Soundproofing

https://www.storeboard.com/blogs/general/soundproofing-foam-is-it-the-solution-to-your-noise-issues/967329

You have a rock band, and no place to practice. Well, you could practice in your cellar, garage, or room yet you reside in a condominium, or a detached house with next-door neighbors crowding you on both sides.