Big Red Rooster White Noise Sound Machine works well.  Not only does this device make white noise but plays 5 natural sounds - rain, brook, ocean, summer night, and thunder.  I've actually been using this at work instead of at home.  It's great to have on low volume to drown out background noise.  Gets decent loud but I can't se any reason one would need to have it blasting.  So the volume range is more than adequate.  It lightweight and small in size making it very portable.  I can see how the sounds would be soothing and help one fall to sleep easier and faster.  For now I am happy to use it at work.  I will probably get a second one for home. [This review was collected as part of a promotion.]