Mixed evidence · speakers or headphones
White noise
Bright, even and hiss-like, with equal power in equal slices of frequency. Often tried to make varied background sounds less noticeable.
Welnific Waves
Find the sound that fits the moment.
White, pink and brown noise. Rain, waves and low ambient tones. Listen, compare and keep only what makes your space feel easier.
No single sound frequency is proven best for sleep or wellbeing. Sound textures work differently, and people respond differently. A quiet comparison is more useful than treating one Hz number as universally beneficial.
The Listening Fit Test
What would help the room feel easier right now?
Choose a situation, then compare the suggested sounds. These are starting points, not prescriptions.
Play and compare
A small library of textures.
Every sound is generated in your browser and begins only when you press play. The default is intentionally quiet. Start lower if you prefer.
Mixed evidence · speakers or headphones
Pink noise
Softer through the high end than white noise. Its energy falls by octave, which many listeners hear as gentler.
Preference-led · limited direct evidence
Brown noise
Deep and rumbling, with more emphasis on low frequencies. A useful comparison when white noise feels too sharp.
Promising, context-dependent
Soft rain
A naturally uneven texture without speech or melody. Some people use it while reading or moving into a quieter part of the day.
Promising, context-dependent
Distant ocean
Low filtered noise that slowly swells and recedes. It is intentionally abstract—not a field recording.
Music evidence is broader; no special Hz claim
Low ambient
Three quiet tones forming a sparse, steady chord. Try it when continuous noise feels too impersonal.
Exploratory · headphones required
Binaural sample
A 220 Hz tone in one ear and 226 Hz in the other, creating a perceived 6 Hz beat. This is a listening experiment, not a promised brain state.
Hear the difference
Texture, not a ranking.
The colors describe how sound energy is distributed. They do not form a ladder from worst to best.
| Sound | Character | Often compared for | Evidence position |
|---|---|---|---|
| White | Bright, constant | Stronger masking | Mixed |
| Pink | Softer, balanced by octave | Gentler steady presence | Mixed |
| Brown | Deep, bass-heavy | A less sharp alternative | Preference-led |
| Nature | Changing, irregular | A familiar soundscape | Promising, context-dependent |
| Binaural | Two tones, one per ear | Curiosity and comparison | Exploratory |
Plain language
What “frequency” means here.
A number in hertz describes sound. It does not, by itself, establish a health effect.
Frequency
Cycles per second, measured in hertz (Hz). For a simple tone, frequency contributes to how high or low it sounds.
Noise colour
A distribution of energy across many frequencies. White, pink and brown noise are not single tones.
Tuning reference
A reference pitch used to tune music, such as A at 440 Hz or 432 Hz. That is different from playing one pure tone.
Beat frequency
The difference between two tones in a binaural recording. The sample here uses 220 and 226 Hz, a 6 Hz difference.
Evidence, with limits
What research can—and cannot—say.
Sound can alter the character of a room and sometimes make interruptions less noticeable. Results do not travel neatly from one listener, setting or recording to another.
Sleep sounds
Systematic reviews report positive findings in some studies, but the overall evidence for white, pink and mixed auditory stimulation remains weak or mixed. Study size, methods and individual differences matter.
Nature and music
Reviews are more encouraging, especially for music, but still heterogeneous. Preference, timing and the particular sound all shape the experience.
Specific frequencies
Small studies do not establish that 432 Hz, 528 Hz or other singled-out numbers have unique, reliable healing effects.
Sound masking
A steady sound may make sudden environmental noises less noticeable. It may also become an interruption itself. The room and listener decide which is true.
Listen gently
Quiet is the starting point.
- Begin at the lowest comfortable volume.
- Use a timer rather than assuming longer is better.
- Take breaks and stop if a sound feels tiring or irritating.
- Keep situational awareness when it matters; do not use headphones while driving.
- This library is designed for adults, not infants, children, pets or clinical use.
- WHO recommends keeping personal-device volume below 60% of maximum; this player starts at 16%.
Go deeper
Five guides, one honest premise.
Sound is personal. There is no perfect frequency and no score to improve.
Compare
White, pink and brown noise
Hear what changes and choose by texture, not hype.
Read the guide →ExploreNature sounds
Rain, water and woodland textures without invented promises.
Read the guide →UnderstandBinaural beats
How the illusion works, why headphones matter and where evidence stops.
Read the guide →ExamineFrequency claims
432 Hz, 528 Hz and why precise numbers can sound more certain than the research.
Read the guide →Try gentlySounds at bedtime
A low-pressure experiment with volume, timers and speaker placement.
Read the guide →How this library was made
All tracks are synthesized locally with the browser Web Audio API. Noise colours use generated broadband noise; rain and ocean use filtered noise; ambient uses three sine tones; the binaural sample uses separate 220 Hz and 226 Hz tones. No recording or health outcome is implied. Evidence and safety language last reviewed 21 September 2026 by Welnific Editorial. Corrections: hello@welnific.com.