I've been using Marpac sound machines for a long, long time -- at least 20 years. I dropped the old one I had, and it got a funny clicking sound in it, so I had to get a new one. This one is just as good as the old ones. It's a nice smooth white noise sound that's very soothing and very much in the background. After all these years sleeping with one going, I can't sleep without one now. With the Marpac, you can turn it to louder or softer with the switch and then further adjust by turning the middle panel which allows more or less sound through the vents on the side. I highly recommend this unit for the quality of the white noise sound and for it's long lasting performance (based on my old ones).
Rating:
[5 of 5 Stars!]