Review on Yogasleep Rohm Portable White Noise Sound Machine + Travel Case In Grey (Pack Of 2) Sleep Therapy, Crush-Resistant Travel Case, For Adults, Kids & Baby, Noise Blocking & Office Privacy, Registry Gift by Jeff Hall

Back in the old days, when I lived in Austin, Texas, and not everyone had air conditioning (it was a LONG time ago), I slept with a fan in the window to try and keep cool at night. It helped ever so slightly. But the interesting result was that the sound of the fan drowned out the sound of the neighborhood, thereby decreasing the incidence of noise intrusion into my sleep. I found that even after I actually HAD air conditioning, I missed the sound of the fan. First I used a tower-type air purifier type thing thinking at least that would be DOING something besides making noise, but that unit became another thing to take care of, cleaning the filter, dusting it, and moving it out of the way when I had company. I happened across the Marpac noise machines and started using those. LOVE THEM, but they didn't provide much in the way of controls - and they were LOUD. They eventually made a smaller "travel" model, with various international plugs and dual voltage, which I purchased and took with me all over the world. These had better volume controls and the ability to change the type of sounds (rain, waves, etc.) Ah ha, hotels now became more bearable: No more elevator pings, less chatter from the neighbors and less hallway interference. Then, I accidentally forgot to change my plug adapter from a foreign trip for a US trip. Shocking. I had to sleep au naturel. It drove me crazy, so I got out the next day and went to a Best Buy store. They don't really sell over the counter white noise machines. So I purchased a small, portable baby sleep machine, which I still take with me for travel because it operates on 3 AAA batteries so I don't need to charge it. But when I got home, I went back online to Marpac and found they made a smaller version of my old sleep noise machine with fewer bells and whistles. It is MUCH smaller than the old one I used to bring with me on trips, and is also much quieter. Yet somehow, it works very well. I'm sleeping as well as ever, but can't sleep without it. So between the portable battery operated one and the USB charged one - I am sleeping like a baby - at home and abroad. LOVE these machines and recommend them to everyone who is sleep challenged. Could just be the ambient noise in your room/house/hotel that's keeping you awake. But, beware, it's habit forming.