Baby Sleep Sounds

Updated 27 June 2026

The most popular baby sleep sounds are white noise and womb sounds, because they recreate the constant, muffled whoosh a baby hears before birth. This free player loops white noise, heartbeat and womb sounds to help settle your little one — with simple safety guidance below.

Why white noise and womb sounds help babies

Before birth, babies hear a constant, muffled whoosh of blood flow and a steady heartbeat, so these sounds are deeply familiar and reassuring. Recreating them can help a newborn feel secure and settle more easily, which is why white noise and womb sounds are a long-standing sleep aid.

How to use baby sleep sounds safely

The American Academy of Pediatrics advises keeping sound machines below about 50 decibels, placing them at least 2 metres (7 feet) from the baby, and not running them louder or longer than needed. Use the lowest volume that works and switch it off once your baby is settled.

How to use white noise for a baby safely

Choose white noise, heartbeat or womb sounds in the player.
Set the volume low — well below a normal speaking voice.
Place the device at least 2 metres (7 feet) from the crib.
Use a sleep timer or turn it off once your baby is asleep.

Frequently asked questions

Is white noise safe for babies?

Used carefully it is widely considered fine. Follow the American Academy of Pediatrics guidance: keep it below about 50 decibels, at least 2 metres from the crib, and no louder or longer than necessary.

What sound is best for a baby to sleep?

White noise and womb or heartbeat sounds are the most popular, because they mimic the womb. Babies differ, so try each at a low volume and keep whichever settles yours most reliably.