Use it as a tool to help them fall asleep, but consider a timer if you don't want it running all night.
The "Classic Vacuum Cleaner" sound mimics the environment of the womb. Inside the mother, a baby is constantly surrounded by "whooshing" noises from blood flow and heartbeats, which can actually be louder than a vacuum. Use it as a tool to help them
Keep the sound source at least 2 meters away from the crib. Use it as a tool to help them