How to make noise-canceling headphones:
1. Get a pair of earbuds.
2. Put them on.
3. Get a pair of noise canceling earmuffs.
4. Put them on, over the earbuds.
I like these earmuffs
for the purpose. They really hug the head (which is nice to keep the sound out) and enclose my ears. At first, they might not seem to be adjustable (and may appear to be for children), but fear not. They are adjustable (pull the metal wire-like part out of each plastic thing that is attached to an earpieces).