White noise machine considered as a device that’s capable of producing range of sounds including all frequency pitches listened by human ear. It has random sounds like ocean waves, waterfalls or wind breeze that masks noises around you. Most sound machines differ in shapes and sizes, nevertheless, they have fundamental and common set up that consists of fan and that depends on the model. They include speed switch to create various sounds which takes place upon receiving sufficient air by fan drive into the internal slots all via the machine case too.