White noise machines work because they mask the intermittent sounds that cause partial arousals — the snoring, the car outside, the building creak — by creating a consistent acoustic layer that your brain learns to filter rather than react to. HUSH's 10 sleep tracks give you options beyond pure white noise: rain, ocean, fan, and other ambient sounds proven to work for different people. The 1600mAh battery lasts up to 30 hours on moderate settings — charge it once and it's good for several nights. The night light means you don't need a separate lamp for 3am orientation.
10 sleep tracks. 30-hour battery. Timer handles the rest.
- 10 BUILT-IN SLEEP TRACKS: ten tracks covering the range of sounds that work for sleep masking — white noise, pink noise, brown noise, rain, ocean, fan, and other ambient options. Not all white noise machines work for all people; ten options means you find the one that works for your acoustic sensitivity and sleep environment.
- 1600mAh — 8 TO 30 HOURS: the 1600mAh battery delivers 8–30 hours of playback depending on volume and whether the LED light is in use. At moderate volume with the light off, most users get 2–3 nights before needing to charge. USB-C at 5V/1A reaches full charge in approximately 3 hours.
- TOUCH-DIMMING COLOR LED: the built-in LED is touch-dimmable and color-adjustable — use it as a night light for 3am orientation without disrupting your return to sleep. Set it to your preferred color and dim level; it remembers the setting when you turn it back on.
- 15 OR 30-MIN TIMER: set the timer before sleep. The HUSH plays your selected track for 15 or 30 minutes then shuts off silently — so you fall asleep to the sound but don't run the battery down through the full night if you only need it for the fall-asleep phase.
Consistent broadband noise — white, pink, or brown — masks intermittent sound events that cause partial arousals, reducing nighttime waking without changing sleep architecture.
sleep tracks — white noise, pink noise, brown noise, rain, ocean, fan, and ambient options
maximum battery playback — 2–3 nights between charges at moderate volume with light off
charging — 5V/1A, approximately 3 hours to full from depleted
White noise sleep masking: JAMA Internal Medicine. Partial arousal reduction with broadband noise: Sleep Medicine Reviews. Customer survey: Calena HUSH users, 60-day trial.
How white noise masks sleep-disrupting sounds
Consistent broadband noise raises the relative loudness of intermittent sounds — a sudden noise against a white noise background is less jarring than the same sound against silence. The brain's threat-detection system is less likely to trigger a partial arousal because the acoustic contrast between background and event is reduced.
Partial arousals from intermittent noise (snoring, traffic, building sounds) are the primary cause of fragmented sleep in noisy environments. White noise masking reduces the arousal response to these sounds without eliminating the sounds themselves — the brain filters the background as predictable and non-threatening.
When the same sound environment consistently precedes sleep, the brain forms an associative cue — the sound itself begins to trigger drowsiness before any other intervention. After consistent use, switching on the HUSH produces a conditioned drowsiness response independent of the masking effect.
For anyone the silence — or the noise — is keeping awake.
The city sleeper
Street noise, neighbors, building sounds — your bedroom is never fully quiet and you can't block it out.
10 tracks with enough variety to find what masks your specific noise environment. White noise works for continuous ambient sound; rain and ocean work well for intermittent urban noise.
The fall-asleep-then-wake person
You fall asleep fine. Then something wakes you at 3am and you can't get back to sleep. The silence in the middle of the night is as disruptive as the noise.
White noise through the night prevents the silence-to-arousal response — and the LED night light gives you just enough light to orient without fully waking when you do get up.
The parent of a light sleeper
Household noise wakes your child and then you're all awake. You need something in the nursery or bedroom that creates an acoustic buffer.
HUSH's 30-hour battery means it runs through the night and most of the next day on a single charge — no scrambling for an outlet at midnight.
The hotel sleeper
You sleep well at home. Hotel HVAC systems, corridor sounds, and unfamiliar acoustic environments ruin your sleep when traveling.
USB-C rechargeable, compact ABS body — HUSH packs easily. Same 10 tracks you use at home, same familiar acoustic environment wherever you are.
The meditation or focus user
You use ambient sound for meditation, focus work, or reading — not just sleep. Your phone app drains your battery and the screen is distracting.
A dedicated device with 10 built-in tracks and a timer is the clean solution — no app, no screen, no distractions. Just the sound and the timer.
Press. Set timer. Sleep.
Choose Your Track
Press the button to cycle through the 10 built-in sleep tracks. Land on the sound that works for your environment — white noise for broad masking, rain or ocean for a softer ambient layer. Adjust volume to your preference.
10 Built-In TracksSet the Timer
Press the timer button for 15 or 30 minutes. The HUSH plays through your wind-down and shuts off after the timer — preserving battery for nights when you want it on all night.
15 or 30-Min TimerCharge Every Few Nights
At moderate volume with the light off, the 1600mAh battery lasts 2–3 nights between charges. When it's time to charge, plug in via USB-C for approximately 3 hours to full. No proprietary charger needed.
USB-C, ~3hr ChargePhone apps drain your battery. Plug-in machines tether you to the outlet. HUSH is neither.
| Plug-in white noise machine | Calena HUSH | |
|---|---|---|
| 10 built-in sleep tracks | ✕ | ✓ |
| Rechargeable — no outlet required | ✕ | ✓ |
| Up to 30 hours per charge | ✕ | ✓ |
| Color night light built in | ✕ | ✓ |
| 15 or 30-min sleep timer | ✕ | ✓ |
| 30-day money-back refund | ✕ | ✓ |
Try it risk-free.
30-Day Money-Back Guarantee
Not satisfied within 30 days? Return it for a full refund — no questions asked. No hoops, no hassle.
1-Year Warranty
Every Calena product is backed by a full 12-month warranty against defects.
Secure Checkout
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We're so confident you'll love this product, we're giving you 30 days to test it. If it doesn't work for you, send it back for a full refund.
Everything you need to know about HUSH.
How long does shipping take? +
Orders ship within 1–2 business days and typically arrive within 5–7 business days in the US. You'll receive a tracking link as soon as your order ships.
What's your return policy? +
We offer 30-day returns on all products. If you're not satisfied for any reason, contact us and we'll arrange a full refund — no questions asked.
Is the product safe and non-toxic? +
Yes. All Calena products are tested for safety and free from harmful chemicals. We only use materials we'd use in our own homes.
How is this different from a cheaper version on Amazon? +
Most cheap alternatives use low-grade materials that degrade quickly and have no scientific basis for their claims. Calena products are anchored in studied mechanisms, built from premium materials, and backed by real guarantees.
Where do you ship from? +
All orders are fulfilled from within the USA for fast, tracked delivery.
What's covered under the warranty? +
Every Calena product is covered by a 1-year warranty against manufacturing defects. If something is wrong, contact us and we'll make it right.