Does Ears & Waves work without internet?

Yes. After your first visit the whole app is saved on your device. All sounds are generated live by your phone or computer, so there is nothing to stream and they play for as long as you like, offline.

What is the difference between white, pink and brown noise?

They differ in how energy is spread across pitch. White noise has equal energy per hertz and sounds bright. Pink noise falls 3 dB per octave and sounds like steady rain. Brown noise falls 6 dB per octave and sounds like a deep rumble.

Is the hearing test a medical test?

No. It is a quick check of the highest pitch you can hear through your own device and headphones. If you are worried about your hearing, see an audiologist.

Endless · Offline · No loops

Rest your ears.

Q: Do the sounds loop?

No. Every sound is calculated sample by sample from random numbers and filters, so it never repeats and has no seams or fades.

Noise, ocean, rain and womb sounds, generated live on your device. Tune every one to your taste, set a timer and fall asleep. No streaming, and it keeps working without internet.

Now playing Deep sleep

Master volume

Mixes

One tap to start. Change anything and save it as your own.

Noise generator

Any color of noise, from deep brown to bright violet — and everything in between.

Brown noise

Noise volume

Spectrum · 20 Hz – 20 kHz

Nature

Rooms & travel

For babies

Womb sounds are what a baby heard for nine months: a deep rush of blood flow, and the heartbeat.

Ear Age · 60 seconds

Test your ears.

Our ears lose the highest pitches first, and it starts early. Find the highest tone you can still hear and see the typical age for it.

Headphones on, quiet room
Set a comfortable volume on the 1 kHz tone
Don't turn it up when a tone disappears — that's the point

20,000Hz

Can you still hear it?

Sound science

The colors of noise

Same randomness, different tilt. Each color shifts energy between low and high pitches — here is what that sounds like.

White

0 dB / octave

Equal energy at every frequency. Because we hear in octaves, it sounds bright and hissy — the classic "TV static".

Pink

−3 dB / octave

Equal energy in every octave, so it sounds even to the ear. Steady rain, rustling leaves. A favorite for focus.

Brown

−6 dB / octave

Deep and warm, like a distant waterfall or a plane cabin. Masks voices and traffic without any hiss.

Grey

Equal-loudness curve

Shaped around how our hearing works, so every pitch seems equally loud. Balanced and soft.

Blue

+3 dB / octave

The mirror of pink: more treble than bass. Airy, crisp, like a light spray.

Violet

+6 dB / octave

Mostly treble, like hissing water. Sometimes used to mask high-pitched ringing.

Take it to bed

An app without the app store.

Add Ears & Waves to your home screen and it opens like any app — full screen, with its own icon. Everything it needs is saved on your device, so it keeps playing on a plane, in a tent or with Wi-Fi off.

Preparing offline mode…

Works offlineNo streaming. Sound is computed on your device, forever.
Screen offKeeps playing with the phone locked. The timer fades it out gently.
PrivateNo account, no ads, no tracking. Your mixes stay on your device.

Questions

Does it work without internet?

Yes. After the first visit the whole app is stored on your device. Sounds are calculated live by your phone or computer, so nothing streams — you can play brown noise for ten hours in airplane mode.

Do the sounds loop?

No. Each one is built sample by sample from random numbers and filters, so it never repeats and has no seams. Ocean waves arrive at random, rain never plays the same drop twice. On iPhone, when the screen locks, playback switches to a long seamless recording of your exact mix, because iOS pauses live audio in the background.

Can I keep it playing with the screen off?

Yes, on Android, iPhone and computers. Start the sound, then lock your phone. Tip: install the app to your home screen for the most reliable background playback.

How loud should it be?

Quieter than you think: about the level of a soft conversation, or a little lower. Every sound here is loudness-matched, so switching between them won't make you jump.

Is the hearing test accurate?

It's a quick check of the highest pitch you can hear through your own device. Phones, headphones and browsers can cut the very top frequencies, so treat it as a fun estimate, not a diagnosis.

Is it free?

Yes. No ads, no sign-up. If you like it, subscribe to the YouTube channel — new tests and 10-hour sounds every week.