Because our ears are sensitive to high frequencies, white noise sounds very hissy. White noise has a spectral frequency of 1. Equal proportions of all frequencies are present.
White Noise MP3 files
The first three longer 20 minute white noise files are all different. They can be used to mask conversations. Play it on your cell phone so those areound you can’t hear what you’re saying. Put one or more onto your mobile phone and play them during sensitive conversations you’d like to keep private.
White noise is sometimes used in some random number generators, as a sleep aid, or to mask tinnitus.