[–] BeauDacious ago
Several layers of thick blankets should help actually. Ensure they cover the entire opening, allowing you to push them aside for ingress/egress. The air gaps and rough patterns in the blankets will assist in deadening any sound passing through them.
[–] [deleted] 0 points 2 points 2 points (+2|-0) ago
[–] TAThatBoomerang [S] ago
That's some next-level thinking out of the box right there. Or in this case, in the box thinking...
[–] HeartAttack99 ago
I don't know, but would a white noise generator take care of it without modification to the apartment?
[–] TAThatBoomerang [S] ago
I mean, the ventilation duct in itself is a white noise generator and it's what I'm trying to remove!
[–] 6714124? 0 points 1 point 1 point (+1|-0) ago
Get some weatherstripping to go around the doorjamb. Then get one of those draft reducing things to go under it. This will not 100% stop it, but it will cut it down a ton. We did similar when our bedroom and our sons shared a joining door (his room was really an office but I could not find a 4 bedroom so we converted it and left the door for after he moved out). It helped cut the noise down between the rooms.
[–] MetalAegis ago (edited ago)
Line the walls with this memory foam material it works similar to the sound proofing material they use in recording studios by dissipating the sound waves.
Alternately you can order online and get a bunch of egg carton flats and attach them to the walls and ceiling.
[–] watch_listed 0 points 2 points 2 points (+2|-0) ago
I'd be wary of sticking up flammable materials up on the wall of a kitchen.
[–] MetalAegis ago
You can order fireproof acoustic cancelling foam but it's a very expensive.
[–] ham-sandwitch ago
Here area some techniques I've used with my home office. Not perfect by any means, but they've definitely helped.
The barrier is a pretty bit project, but it might give you some ideas.