White Noise
Constant power across all frequencies. Ideal for masking distracting speech.
FREQUENCY: HIGH
Grey Noise
Shaped for the ear, not the spectrum analyser — equally loud at every frequency.
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Sound Library
Calibrated frequencies for deep work and relaxation.
Color Noises
Continuous frequencies for auditory masking.
Brown Noise
Deep, bass-heavy rumble reminiscent of a distant waterfall or thunder.
FREQUENCY: LOW
Pink Noise
Balanced spectrum that sounds more natural to the human ear, like steady rain.
FREQUENCY: BALANCED
Red Noise
Even deeper than Brown noise, focusing heavily on the low-end spectrum.
FREQUENCY: LOW
Black Noise
Near-silence with subtle low-frequency drift. Meditative, like the sound of a quiet room at night.
FREQUENCY: NEAR SILENT
Grey Noise
Psychoacoustically equalized to sound equally loud at every frequency.
FREQUENCY: EQUALIZED
Ambient Sounds
Natural soundscapes recorded in high fidelity.
Rain
Gentle rainfall creating a natural, soothing atmosphere perfect for deep concentration.
SOURCE: RECORDED
Rain on Tent
Rainfall on a tent canvas — cozy, immersive and deeply relaxing for focused work.
SOURCE: RECORDED
Ocean Waves
Rhythmic ocean waves rolling onto shore — a timeless natural soundscape for calm focus.
SOURCE: RECORDED
Wind
Steady breeze flowing through open spaces — airy and expansive for clear thinking.
SOURCE: RECORDED
Forest Stream
A gentle brook flowing through a quiet forest — peaceful and grounding for deep work.
SOURCE: RECORDED
Meadow
Birds and insects in a sunlit meadow — warm, organic ambience for relaxed focus.
SOURCE: RECORDED
Binaural Beats
Brainwave entrainment through stereo frequency offset. Layers with any noise above.
Headphones required for binaural effect
Delta
Deep sleep and healing. Ultra-low 2 Hz beat for total relaxation.
BEAT: 2 Hz
Theta
Meditation and creativity. 6 Hz beat for deep introspection and flow.
BEAT: 6 Hz
Alpha
Calm focus and learning. 10 Hz beat for relaxed concentration.
BEAT: 10 Hz
Beta
Active thinking and energy. 14 Hz beat for alertness and problem solving.
BEAT: 14 Hz
Flat to you, not to the meter
Human hearing is not equally sensitive across the spectrum. We hear best between roughly 2 and 5 kHz and progressively worse towards the extremes; the equal-loudness contours mapped by Fletcher and Munson in the 1930s, and standardised since, describe the shape of that bias.
Grey noise inverts it. Instead of putting equal power in every band — what white noise does — it puts more power where the ear is insensitive and less where the ear is sharp, so that every part of the spectrum arrives at the same perceived loudness. On a spectrum analyser it looks lopsided. To a listener it is the most genuinely even noise of the set.
What that gets you
The practical effect is coverage without a peak. White noise has an obvious brightness; brown noise has an obvious weight. Grey noise has neither, which makes it hard to describe and easy to forget is playing — usually the point.
It is also the most useful colour when you are masking across a wide range at once: a room with both a loud fan and a nearby conversation, where white noise would handle the voices but scream, and brown noise would handle the fan but ignore the voices.
A note on the term
Grey noise is defined against a specific hearing curve, and no two people share exactly the same one — age, ear shape and history all shift it. Any grey noise you play, here or elsewhere, is matched to an average listener rather than to you. Treat it as "flatter than white for most people", not as a personalised calibration.
If it sounds close but not quite right, pink noise is the nearest alternative and is what many people end up preferring.
Common questions
How is grey noise different from white noise?
White noise has equal power in every frequency band, which sounds bright because your ear is most sensitive to high-mid frequencies. Grey noise compensates for that sensitivity curve, so every frequency arrives equally loud to a listener even though the underlying spectrum is not flat.
Is grey noise better for tinnitus?
Some people find broadband noise helps make tinnitus less noticeable, and grey noise is sometimes suggested because its coverage is perceptually even. Responses vary a lot from person to person, and persistent tinnitus is worth raising with an audiologist rather than self-managing.
Why does it sound quieter than white noise at the same setting?
Because it puts less energy in the region your ear amplifies. Nudge the volume up until it matches; that is expected behaviour, not a fault.