Garden Soundproofing

https://www.goodreads.com/topic/show/20053841-soundproofing-foam---is-it-the-answer-to-your-noise-problems

You have a rock band, and also no location to exercise. Well, you might practice in your cellar, garage, or room but you live in a condominium, or a detached home with next-door neighbors crowding you on both sides.