"Similar to the roar of empty space or more commonly known as white noise. As a comparison, the sound of 'shushing' in the womb ranges from 72 to 88 decibels, while the sound of a vacuum cleaner ranges around 70 decibels. In other words, the womb where the fetus develops is not a quiet place."

"The thing that sometimes makes some babies have difficulty sleeping and feel uncomfortable in a room that is too quiet. For moms and dads who find it hard to make their little ones calm while sleeping, you might consider playing white noise in the room."

"White noise can create a sound like the womb that soothes babies, encouraging them to stop crying and fall asleep faster. Research shows that white noise can also help children perform certain tasks that may be affected by attention deficit/hyperactivity disorder (ADHD), such as sound recognition."

"Babies can easily wake up during this light sleep period and become anxious, which leads to the end of sleep time. This white noise can help babies sleep longer during light sleep and fall back into a deep sleep. For the use of this white noise, the volume should not be too loud."