Pure white noise doesn't quite work for me because my hearing will try to make sense of it anyway. It's akin to looking at tv static and seeing images fuzz & flicker in and out of the signal noise. Interestingly enough, this observation got me into making noise music for awhile, it started with just some noise oscillators running through filters with lfo's on them. Then add in some noise osc's with amplitude envelopes and you can create rhythmic elements, but I digress.