best batting for "sound proofing"
 

I've been asked to make a wall hanging (5 x 8) for someone that wants to dampen the noise in a room. I'm wondering which batting would be best. I thought about using polyester to make it lighter but thought maybe warm and natural may help with the sound absorption. Any suggestions would be helpful. Thanks

certainly no expert, but seems to me that a cotton or cotton/poly would be the best sound proofer due to density of bat.

oh someone asked a similar question here, perhaps someone will pipe up!

If you look at soundproofing materials, such as the egg carton foam they put in recording studios, and sound-absorbing panels they put in auditoriums and restaurants, you will see that they are very textured with lots of nooks and crannies. Based on this observation, I would use a lofty batting.

Honestly, if I were trying to dampen noise in a room, not only would I use wallhangings (multiple, if possible) I would also hang thick draperies such as velvet or velour, and even investigate adding something to the ceiling.

I don't think you can soundproof a room with a quilt. You need special
soundproofing material and it can't be quilted. You will wreck the whole
thing doing that.

in times past, they used to hang tapestries. but then, they couldn't go out and buy something. Good luck.

I have my doubts that a quilted wall hanging would do much in the way of soundproofing a room.

I know the title says "sound proofing", but in the OP's post she says "dampen the noise" which I believe you can do to an extent with fabrics. When we redid our family room (new paint, new furniture, the whole 9 yards) I noticed a bit of an echo. I hung curtains on the window and the French doors, a quilt on one wall, and draped another quilt on the couch. It helped quite a bit with the echo.

When my sons were teenagers we put cork on a wall in each of their rooms so they could pin posters,etc. it really absorbed a lot of noise and looked really nice. They are both grown now with children of their own. My older one is even a granddad. Time flies!

To really sound proof or severely dampen sound you must use the heavy foam made for this purpose. For mild absorption of sound cork will do. A quilt may muffle mildly sound but it is not going to, by any means, soundproof a room. As an example cover your ears with a quilt and listen to the mild changes that is about all it is capable of doing. I use quilts to absorb trace sounds but that is the max you will receive.