Treatment to dampen sound inside of a closet-Acoustics Forum-Acoustic Fields Forum

Hi, I found you on YouTube while researching soundproofing. Your videos are incredibly helpful! I’m an absolute beginner so apology for all the gaps in my knowledge, but I’m just seeking advice on the following project.

My project – Silly as it sounds, I’m just trying to turn my closet (image link at the end of the post) into an area where I can practice my singing (my roommates and I have opposite work schedules so I’m often practicing when they’re sleeping. I don’t have a car to practice in and renting practice space isn’t an option right now). My goal is to dampen the amount of sound my roommates AND the apartment below me can hear as much as possible, knowing full well that “soundproofing” to any degree is completely unrealistic without constructing a separate structure within the closet. So again, reducing the amount of sound they can hear is my only goal. I’m on a budget and trying to spend less than $350 if at all possible…luckily I’m on the top floor so I don’t need to worry about sound traveling upwards.

After hours of DIY research, the initial plan I came up with was: 1) create rockwool panels by encasing rockwool in chicken wire and then encasing the panel in a sleeping bag, and hanging one of those on every wall in my closet 2) covering the walls with panels of MLV vinyl using a staple gun, going over the rockwool panels, and then 3) making a lame attempt at a floating floor by laying down another layer of MLV vinyl on the floor, stacking some neoprene rubber blocks and then overlaying that with some drywall to form my “floor.” Another guy even recommended a layer of tennis balls cut in half instead of the rubber blocks.

However, after watching your videos I don’t want to go anywhere near rockwool. So I feel back at the starting line. So my question remains – if I want to reduce the sound as much as possible that others can hear when I’m singing in this closet, with the sliding mirror door closed, what treatments or materials would you recommend (staying hopefully under $350)? And furthermore, though I’m afraid to ask, can I even achieve any meaningful sound dampening via DIY methods on this budget, or is this a waste of effort? Some other hacks I was going to try was buying soundproofing window treatments for home theaters and hanging those, but those are around $400 each and I’d need 4 of them.

Thanks in advance for your advice. Really appreciate all the knowledge you’re spreading via your channel.

Photo of closet:

View post on imgur.com