White noise played through a phone speaker can often sound hissy or tinny…which is not ideal for sleep! (Plus, phones release microwave radiation, so if you are using it for white noise, keep it on airplane mode when near Baby.) The best white noise for snoozing is deep and rumbly…like the sound babies hear before they are born. And the best way to get that sound is through a white noise machine with special sounds designed specifically for promoting sleep. If portability is what you are looking for, know that Happiest Baby’s SNOObear has a white noise module that is removable and perfectly sized to tuck into a diaper bag. And SNOObie’s cloud easily detaches from its dock—and holds a charge all night—making it a great on-the-go soother, too!