I bought one with "noise reduction wool" inside the door + special frame (when close the room door, something will block the gap beneath the door)...
I bought at "Wo Fu" door company at Wanchai.
However, no much use. Actually no difference from ordinary door.
I have asked "noise reduction" specialist (those who build "recording studio" for CD production). Real noise reduction door is very sophisticated stuff. Need to do by expert and cost around $8,000 / door.
However, since it's only a few hundreds dollars more in your case, I think there is no harm to add the "wool" inside the door. It may have some help.
原帖由 NatalieBaby 於 10-4-26 11:06 發表
I bought one with "noise reduction wool" inside the door + special frame (when close the room door, something will block the gap beneath the door)...