People, babies in particular, seem to like white noise to help them go to sleep. As a child I often slept in front of a fan with the explicit purpose of letting the sound lull me to sleep. On airplanes I sleep like the dead (lucky!)
Today, Hirono had a really clever idea. There is a guest bathroom downstairs right next to the family room. It has a really loud vent fan. We often turn the vent fan on when the girls are about to take a nap. It nicely drowns out the kitchen noises without disturbing the girls slumber. Well, tonight when Alisa wouldn't go to sleep Hirono held her in the guest bathroom itself while the vent fan was on. The loud white noise of the vent fan quickly put Alisa to sleep. Great idea! My wife is so clever.