The proper approach IMHO is to reduce incoming noise then add some of your own to mask it. I'm not a big fan of audio canceling headphones (I'm one of those tha

The proper approach IMHO is to reduce incoming noise then add some of your own to mask it. I'm not a big fan of audio canceling headphones (I'm one of those that finds the perceived 'pressure' distracting and disconcerting), but in-ear buds or headphones already block a lot. Foam tip earbuds are even mor effective. Add some quiet brown noise to mask what's left, and you should be good.