A little background sound is optional. If you choose to use it, keep the speaker away from your baby, the volume very low, and the session short. Silence is also a perfectly valid choice.
Compare three available sounds: a soft white-noise texture, pink noise, and quiet rainfall. Nothing plays automatically. This page is for caregivers, not a promise that audio makes babies sleep or prevents sleep-related harm.
Based on the American Academy of Pediatrics' guidance on noise exposure and its safe-sleep recommendations.
Check the device's physical volume first. Press Play only if sound is appropriate for your situation, then adjust using the shared player. You remain in control of the session.
A continuous, original synthesized texture. Set a very low volume before playing. If you would rather not use sound, simply leave the player stopped.
Ready: Soft White Noise
The audio engine can loop continuously on supported browsers, but continuous playback is a technical capability, not a recommendation to leave sound running all night for an infant.
These sounds are different recordings or independently rendered masters, not three names for the same audio file. Use Listen now to switch without leaving the page. Open Sound details for a complete description and source information.
Soft, steady synthetic hiss
A less bright variation of classic white noise. Its steady sound has fewer noticeable events than a field recording, but perceived loudness still depends on the speaker and volume.
Original DSP · 10-minute masterSteady, lower-weighted noise
Pink noise places less emphasis on higher frequencies than white noise. Its continuous texture may be preferable to some listeners; it is not medically proven to improve every baby’s sleep.
Original DSP · 10-minute masterGentle, changing rainfall
A CC0 field-recording arrangement with natural variations. It contains about one minute of independent original rain material arranged into a ten-minute master, so the rain patterns repeat.
CC0 field recording · arranged 10-minute masterSwitching tracks may change perceived loudness. Lower the volume before comparing. Rain sounds naturally change over time; no noise color is proven safest or best for all infants.
Follow standard safe-sleep practices: place an infant on their back on a firm, flat sleep surface with a fitted sheet, and keep loose objects and cords outside the sleep space. Audio does not replace these measures.
Put the device away from the crib, not under bedding or within reach. Check the actual volume in the room before playing. There is no universal safe percentage that a website can set for you.
If you use sound at all, select a short timer or stop it manually once it is no longer needed. A browser-based Sleep Timer can be delayed while the phone is suspended, so do not depend on it as the only control.
Soft White Noise and Pink Noise each use a ten-minute synthesized master; Rain on Window is a ten-minute arrangement derived from about one minute of CC0 field recording. Native HLS or MP3 looping can repeat these sources. That does not add new independent recording, certify a sound pressure level, or make long exposure automatically safe.
No. Some families use background noise, but it is optional and not a requirement for healthy sleep. A quiet environment may be the better choice. No track on this site is guaranteed to help a particular baby fall asleep.
As low as practical, with the device placed away from the baby. A number on a phone's volume slider or an audio file's LUFS value cannot establish the sound-pressure level at the baby's ears. See the AAP noise guidance.
The American Academy of Pediatrics recommends limiting the duration of infant sleep-machine use. This site can loop audio continuously for other listening purposes, but its ability to loop is not a recommendation for overnight infant exposure. Consider a brief session or turn it off when the baby is asleep.
Keep the sound device as far from the infant as possible and never in or attached to the crib. Keep electrical cables and other loose objects out of the baby's sleep area. Follow AAP safe-sleep guidance regardless of whether you use audio.
No. They are audio files, not clinically calibrated sound machines. Speaker amplification, distance, room acoustics and duration affect exposure, and the player cannot measure the sound level at a baby's ear. Caregivers must control actual output.