I use a physical white noise generator by Marpac: <a href="https:&#x2F;&#x2F;www.marpac.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.marpac.com&#x2F;</a><p>It&#x27;s essentially a fan inside of a cylindrical thing, but it doesn&#x27;t cause any real air movement like an actual fan would. You can adjust the volume and timbre of the sound, too.<p>It probably won&#x27;t drown out a snoring partner, but I never wake up when a train sounds its horn a few blocks away in the middle of the night. When I traveled without it once, I really missed it as I heard all the traffic noise outside of my hotel.