"White Noise" is a type of monotonous, rhythmic sound. These sounds imitate the continual "whooshing" sound made by the blood flowing through arteries near the womb. This "White Noise" can be in the form of a vacuum cleaner, clothes dryer, rain and so on. You must mimic the sound your baby heard in the womb to comfort and soothe. It helps babies who are fussy and have trouble sleeping.

What some Experts say about “White Noise”

Dr. William Sears, a pediatrician and author of pediatric books says, “along with motion, most babies are soothed by sounds, preferably ones that remind them of the womb. The most calming sounds are rhythmic, monotonous, and low-pitched and humming in quality; this will lull an overloaded mind into sleep."

"White noise, such as a recording of ocean waves or the monotonous sound of an electric fan or vacuum cleaner, may help your baby
relax”. ---Mayo Clinic

“Provide white noise, such as running the vacuum cleaner, clothes dryer, or hair dryer near your baby. (Do not put your baby on top of the dryer—they could fall off!) White noise simulates the whooshing sound your baby heard constantly while in utero. You can also do your own “whooshing” or “shushing” with your voice as you rock or carry your
baby”.---University of Michigan Health System