White noise for babies is a popular tool to help them fall asleep and stay asleep. Here's what parents need to know about ...

White noise is a type of sound that contains all audible frequencies at equal intensity. It’s often described as a steady, consistent hum, like the sound of a fan, rainfall, or static on a TV.

White noise sounds similar to TV or radio 'static', but constant background noises such as a washing machine, vacuum cleaner, fan or running water also help promote sleep in the same way.