Several studies have shown that most newborns who are exposed to white noise at bedtime fall asleep within approximately five minutes and remain in deep sleep for longer periods of time.
Since white noise contains all the frequencies of the sound spectrum and none of them stands out above the others, it is very effective in masking other environmental noises that could disturb or wake the baby, such as the sound of traffic or the cry of another child.
Your crying baby will calm down fast when you play this white noise audio file.
Try it for yourself and see how much your child loves it.
Play it on a bluetooth speaker minimum 2 meters away from the baby and never exceed 45db.