White
0 dB / octave
Equal energy at every frequency. Because we hear in octaves, it sounds bright and hissy — the classic "TV static".
963 Hz.
The highest of the nine Solfeggio frequencies, often called the “God frequency”. Hear it as a pure tone, next to 528 Hz, and over softer sounds. Keep the volume low: high tones tire the ears.
Now playing
Deep sleep
Listen and compare
Tap an example to play it, and again to pause. 963 Hz is high and thin; over rain, a drone or brown noise it becomes much easier to listen to.
About 963 Hz
963 Hz is the highest of the nine Solfeggio frequencies, a set popularised in the 1990s. It is often linked to the pineal gland and to “oneness”; neither claim has any evidence behind it.
Musically it sits almost half-way between the notes A♯ and B an octave and a half above middle C, so it fits no standard scale. As a quiet, steady tone it can still be a calm point to rest your attention on.
Facts that often get mixed up
- The digits 9, 6 and 3 add up to 18, and 1 + 8 = 9: that numerology is behind the “God frequency” name, not physics.
- The pineal gland responds to light and darkness, which set its melatonin rhythm; no study shows that a sound “activates” it.
- High tones tire the ears faster than low ones at the same loudness. Play 963 Hz quietly, or under rain or brown noise.
| 963 Hz | 528 Hz | 440 Hz | |
|---|---|---|---|
| What it is | The highest Solfeggio frequency, called the “God frequency” | The best-known Solfeggio frequency, the “love frequency” | The note A, the tuning standard |
| Nearest note | Between A♯5 and B5, 44 cents below B5 | C5, about 16 cents sharp | A4 exactly |
| Commonly claimed | “Pineal gland activation”, “oneness” | Love, “DNA repair” | — |
| Evidence | None | One tiny study on stress | — |
| How it sounds | High and thin; keep it quiet | Bright and clear | Bright and familiar |
What is 963 Hz?
A pure tone at 963 vibrations per second, the highest of the nine Solfeggio frequencies.
Does 963 Hz activate the pineal gland?
No. That claim has no research behind it; the pineal gland responds to light, not to tones.
Why does 963 Hz sound harsh?
Our ears are most sensitive between about 1 and 4 kHz, so a high pure tone stands out. Turn it down, or layer it under a softer sound.
Mixes
Pick what you need. One tap to start, change anything and save it as your own.
Focus timer
Work in waves.
The Pomodoro rhythm: focus with calm sound in your ears, then take a real break. A soft bell marks every change, so you never watch the clock. Every fourth break is a long one.
Every fourth break is twice as long.
25:00Focus · 1 of 4
Sound while you work
Breathe
Slow your breathing down.
Follow the circle and the sound: it rises as you breathe in and falls as you breathe out. Choose a rhythm, or set your own, and pick what plays underneath.
Ready
Sound while you breathe
Noise generator
Any color of noise, from deep brown to bright violet — and everything in between.
Brown noise
Spectrum · 20 Hz – 20 kHz
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.
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.
Calm
Gentle tones to settle into: singing bowls, a slow warm drone, wind chimes tuned so every note fits.
Frequencies
Famous tones on pages of their own: hear them side by side, with honest facts.
Sound phenomena
How sound bends, shifts, rings and fools the ear, and why space is silent: hear it for yourself.
Nature
Rooms & travel
Animals & countryside
A purring cat, whales and dolphins, a nightingale in the dark, cowbells on a summer pasture. Wonderful in stereo.
For babies
Womb sounds are what a baby heard for nine months: a deep rush of blood flow, and the heartbeat.
Hearing and speaker tests
Check your ears, headphones and speakers, each test on a page of its own with a live picture.
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
Step 1 · Volume
Play the reference tone and set your volume so it's clear but comfortable. Leave it there.
Step 2 · Listen
8,000Hz
Your result
8k12k16k20k
A rough guide, not a diagnosis. Your phone, headphones and even this browser can cut the highest tones. Worried about your hearing? See an audiologist.
More ear tests
Check your headphones, find the deepest bass your setup can play, or play any pitch you like.
Headphones check
Left & right
Each ear should get its own side. It matters for 8D, binaural beats and every stereo sound here.
Headphones on, then tap a side.
Bass test
How low can you go?
Deep tones from 200 Hz down to 20 Hz, the bottom of human hearing. Mostly it tests your speakers or headphones.
200Hz
Your setup plays down to
Tone generator
Any pitch, 20 Hz – 20 kHz
Hz
Start quiet: high tones and square waves get tiring fast.
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 cookies. Your mixes stay on your device.
