We have a new Grand baby girl - soon to be four months old. My daughter-in-law found an app on her phone called "white noise". One of the sounds is a running vacuum sweeper. This thing is magic! When little Haddie is fussy and doesn't want to go to sleep, she simply turns this on and the baby immediately calms down and is happy once again and often falls asleep. Needless to say, I (her Nana) now have this free app on my phone also!