Hi, I was hoping to ask for some help regarding door hinges. I'm planning on trying to soundproof my door a bit, which would add on some weight, so I'm thinking of putting on another hinge or two. The problem is that I don't know what kind of hinge to look for! The left side of the hinge attaches to the jamb in between the door and the jamb but the right side attaches flush on the face of the door. Does anyone know what this type of hinge is called? Thanks a bunch for any help.