The cool thing is you don't have to even leave your house to do this, Michael. Put on some combat boots or something heavy and loud. Walk. Try to reduce the noise to 0, or as close as you can get. Then try other footwear, other surfaces. Gravel and cinders are hard surfaces, since they slide all over each other. When you're super quiet at walking speed, then try increasing the speed and distance.
I did this with dress shoes on tile yesterday at work. It was the only workout I got, and I totally forgot about it.