I am a trained opera singer. I just moved into a single family house. I had a concern about the noise because the neighbors were not far away and I usually practice in the evening after work. Luckily, they cannot hear me from the inside, but they can from the sidewalks and driveways. When I placed my keyboard in the walk-in closet of the master bedroom and practiced, I could tell the significant reduction of the noise even in the sidewalks and driveways. With the acoustic foams covering all four walls of the walk-in closet, I believe I can make it practically noise-free.
Now, I do not want to apply the adhesive directly on my walls. There has to be something in between my walls and the acoustic foams. I think that foam boards can be a viable option. Just staple them on the walls and apply adhesive on it to stick the acoustic foams. When it is the time to sell the house, I can take the staples off to convert it back from a practice room to a walk-in closet.
What do you guys think? Do I have any other options better than foam boards?