Bests & Worsts Reviews from Amazon

High frequency noise often found in computerized renditions of natural sounds is a problem that exists in this product. When used in a sleep environment, the high pitched hiss of their computerized version of natural sounds can prevent sleep rather than aid it. But having some basic sound engineering background, I realized that what is needed is a low-pass baffle, that would allow the lower sound frequencies to pass thru, while blocking the high frequency computerized noise. The solution is simple in this case. Just keep the box the product comes in, and when using the sound machine, after you have set the noise and volume to your liking, just put it back inside the box and close the lid. By playing this sound machine inside its own packaging carton you can get a nice soothing sound of rain, that is now guaranteed by me to allow deep sleep. A flawed product, but with simple customer intervention can work well. Too bad the manufacturer couldn't build in tone control, not hard to do, but they didn't do it. But if you prefer higher pitched full treble renditions of natural sound, you may prefer this unit's sound as is.