The sound of a door slamming can be alarming, to say the least. Quiet them with some simple felt pads.
Photo by Home Hacks
This trick from Home Hacks is a bit less visible than the rubber band trick we've talked about before. Grab one or two felt pads and stick them inside the door frame. You can put them around the lock area, or spread them out closer to the top and bottom. The pads will catch the door before it hits the frame. While it won't completely silence the slam, it will quiet it, providing you some protection from the sound.
Silence Slamming Doors [Home Hacks]