NZXT Hush Mid-Tower Caseccokeman -
The swing away door is held on by 2 chrome plated metal hinges.This seems to be a longer lasting solution than plastic pins and slots. The door is kept from making noise due to vibration by soft rubber pads located on the left hand side of the front cover.
Here is what I have been waiting to look at. As you can imagine there had to be some kind of sound dampening material installed in the case. Both of the side panels,the top and bottom panels and the back side of the drive bay covers are all covered in a sound dampening foam. The foam measures about 3/16 of an inch thick.