White Noise - Relax

http://en.wikipedia.org/wiki/White_noise

http://www.google.com/search?num=100&hl=en&newwindow=1&safe=off&client=opera&rls=en&q=White+noise+relax&btnG=Search&aq=f&aqi=&aql=&oq=&gs_rfai=

http://www.makeuseof.com/tag/6-free-white-noise-sites-to-relax-or-set-yourself-to-sleep/