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Vacuum Cleaner Sound for Babies

Many parents discover it by accident: the moment the vacuum starts, the crying stops. This is that sound, made gentle: a deep, muffled roar with a soft motor hum, and none of the shrill whine or the bumps and clatter of real cleaning.

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About this sound

Sound	Deep, muffled roar with a soft mid-range body
Motor	Gentle low motor tones, never a high whine
Glide	Every 7.5 seconds the roar deepens softly, like the nozzle gliding over a rug
Filter	5 kHz low-pass
Length	10 hours, seamless loop
Screen	Picture for a few seconds, then fades to fully black
Made by	Generated and mixed in-house by Shush Bean (not a recording)

What the research says

Why a vacuum can stop the crying

A vacuum cleaner makes a loud, steady broadband sound, close to white noise. With white noise playing, 80% of newborns fell asleep within five minutes, compared with 25% without it ^[1]. In a small randomised trial of colicky one-month-olds, white noise also reduced daily crying time ^[2].

Why we made a soft version

A real vacuum is loud. Researchers who measured infant sleep machines found that many were well above recommended nursery levels at full volume ^[3]. Our version keeps the soothing roar, removes the whine, and is mixed to a moderate level so you can play it quietly.

What we still don’t know

We could not find a study that tested vacuum sounds in babies specifically. The evidence is for steady broadband sound in general, so think of this as a gentle option some babies love, not a treatment for colic.

Why we fade to a dark screen

Young children’s body clocks are very sensitive to light in the evening. In a small study of preschoolers (ages 3–5), one hour of bright evening light cut the sleep hormone melatonin by 88%, and it stayed low for at least 50 minutes after the light was switched off ^[4]. A phone screen is far dimmer than that study’s light, and babies were not studied, but the lesson is simple: the less light in the nursery, the better. That is why every Shush Bean video shows its picture only briefly and then fades to a fully black screen.

How loud is too loud

Researchers in Toronto measured 14 infant sleep machines at full volume. At 30 cm (about 1 foot) every one of them was louder than 50 dBA, the limit recommended for hospital nurseries, and three could exceed 85 dBA ^[3]. Their advice: keep the device well away from the crib, keep the volume low, and do not run it at full volume all night. The American Academy of Pediatrics’ safe sleep guidance still comes first: baby on their back, on a firm flat surface, in their own crib or bassinet with nothing else in it ^[5].

How to use it

Start it while you hold, rock or feed, before crying peaks.
Turn it down further once your baby is asleep.
Keep the device across the room, never in the crib.

Use sound gently

Keep it low. Choose the lowest volume that still masks background noise. If you have to raise your voice to talk over it, it is too loud.
Keep it far. Put the phone or speaker across the room, not in or next to the crib. Researchers who measured infant sleep machines advised keeping them more than 2 metres (about 6.5 feet) away.
Keep sleep safe. Baby on their back, in their own crib or bassinet, with nothing else in it.

Source: Hugh et al., Pediatrics (2014), as summarized by Children's Hospital of Philadelphia.

Questions

Is this a real vacuum recording?

No. We design the sound ourselves so it is smooth and steady, with no bumps or clatter.

Is it good for colic?

Many parents use it on colicky evenings. Colic has many causes, so talk to your pediatrician if the crying worries you.

Vacuum or hair dryer?

The vacuum is deeper and fuller; the hair dryer is lighter and airier. Try both.

References

Spencer JA, Moran DJ, Lee A, Talbert D. White noise and sleep induction. Archives of Disease in Childhood. 1990;65(1):135–137. Link
Sezici E, Yigit D. Comparison between swinging and playing of white noise among colicky babies: a paired randomised controlled trial. Journal of Clinical Nursing. 2018;27(3–4):593–600. Link
Hugh SC, Wolter NE, Propst EJ, Gordon KA, Cushing SL, Papsin BC. Infant sleep machines and hazardous sound pressure levels. Pediatrics. 2014;133(4):677–681. Link
Akacem LD, Wright KP, LeBourgeois MK. Sensitivity of the circadian system to evening bright light in preschool-age children. Physiological Reports. 2018;6(5):e13617. Link
Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome. Sleep-related infant deaths: updated 2022 recommendations for reducing infant deaths in the sleep environment. Pediatrics. 2022;150(1):e2022057990. Link

This page summarizes published research for general information. It is not medical advice. Research on sleep sounds for babies is still limited; talk to your pediatrician about your baby’s sleep and crying.