I have used a white noise machine for over 25 years to help me sleep. I had one I used for travel, and I don’t think I would be getting hardly any sleep in a strange bed in a hotel room without one.
That one was a hand-me-down from my Mother, and was about the size of the old-school cassette Walkmans—though it also had an alarm clock, a radio, and weather radio in it—pretty nice. It finally died, and I knew I had to get something to replace it before I traveled anywhere else.
This one is nice and small, and weighs less than my old one—good for traveling.