white noise

Thinking of what to fill in the silence if there was to be silence in the film, I looked up white noise and sounds that I thought I could use. In youtube I came across a clip of under water sounds and I imported it into premier and using the equaliser in audio effects, I played around until the bubbling sounds were gone, lowered the pitch a bit, and then stretched it to get a sort of closed off noise, like you're being submerged kind of sound...