Loop da loop

If youre a true insomniac, this may not work for you. It sounds okay for a few minutes until you realize its a looped recording, repeating over and over. You can hear the particular sounds, and after a while it becomes disturbingly rhythmic, especially if you have good hearing. For that reason it is not really "white" noise, since it is not constant.

Thazil about Bed Time Fan - White Noise Sounds