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Often such devices do not produce actual white noise which has a harsh sound but pink noise whose power rolls off at higher frequencies or other colors of noise. Downloading a white noise app onto a smartphone tablet or other portable electronic device may be a cheaper alternative to purchasing a white noise machine. Alliner White Noise Sound Machine For Sleeping Baby Kids Adults White noise is created by a continuum of frequencies equally distributed over the whole hearing range. White noise device . A white noise machine is a device that produces a noise that calms the listener which in many cases sounds like a rushing waterfall or wind blowing through trees and other serene or nature like sounds. What is white noise. We felt that the pictek white noise device is a good wholesome product mainly due to its guarantee and customer satisfaction rate. Even when a white noise machine has six sounds it feels a bit lacking. Unlike generalized white noise machines for human ears ...