You aren't likely to find anything that will be soundproof altogether. The best 'headphones' you can find to eliminate noise are likely considered 'ear protect

You aren't likely to find anything that will be soundproof altogether. The best 'headphones' you can find to eliminate noise are likely considered 'ear protection' on a gun range. If the objective is a standalone device for noise isolation, those are the closest you're likely to get. Slightly better would be the earbuds you see with scalloped inserts (the kind that look like this: http://gearmedia.ign.com/gear/image/article/771/771337/gdc-2007-etymotics-premiers-edge-gaming-earbuds-20070307063910085-000.jpg http://gearmedia.ign.com/gear/image/article/771/771337/gdc-2...) -- they have more layers of insulation when inserted, and have the added benefit of being able to be augmented by speaker-borne audio.