Pink noise is a sound signal where power decreases proportionally as frequency increases, following a 1/f spectrum. It emphasizes lower frequencies, producing a deeper, warmer sound than white noise. Natural examples include steady rainfall, rustling leaves, and ocean waves.

What is the difference between pink noise and brown noise?

Pink noise decreases in power at 3 dB per octave, producing a balanced, warm sound. Brown noise decreases more steeply at 6 dB per octave, resulting in a deeper, rumbling quality similar to thunder or a strong wind.

Is pink noise good for sleep?

Yes. Research published in Frontiers in Human Neuroscience found that pink noise synchronized with brain waves enhanced deep sleep and improved memory consolidation in older adults.

Can pink noise help with ADHD and concentration?

Some research suggests ambient noise, including pink and brown noise, can improve focus in people with ADHD by providing a steady auditory backdrop that reduces the brain's tendency to seek stimulation.

Is this pink noise generator free?

Yes. Listen to Noise is completely free with no account required. The pink noise generator runs directly in your browser using the Web Audio API.

Pink Noise Generator — Free Online

What is Pink Noise?

Pink noise is a type of sound signal where power decreases proportionally as frequency increases, following what's known as a 1/f power spectrum. Unlike white noise — which distributes equal energy across all frequencies and sounds like harsh static — pink noise emphasizes lower frequencies, producing a deeper, warmer, and more natural sound.

Think of it as the sonic texture of the natural world. Steady rainfall, wind through trees, rustling leaves, and ocean surf all exhibit pink noise characteristics. Each octave in pink noise carries equal energy, which is why it sounds balanced and organic rather than sharp or artificial.

Pink Noise vs White Noise vs Brown Noise

Not all noise is created equal. The "color" of noise describes how energy is distributed across its frequency spectrum.

Pink Noise

Balanced, warm, natural

Power decreases at 3 dB per octave. Sounds like steady rain or wind. Ideal for sleep, meditation, and general focus.

White Noise

Bright, hissy, even

Equal energy at every frequency. Sounds like TV static. Effective for masking sharp, sudden sounds.

Brown Noise

Deep, rumbly, powerful

Power decreases at 6 dB per octave. Sounds like distant thunder. Popular for deep focus and ADHD.

This generator produces pink noise by default. Choose a Character preset to set the overall tonality. The two Brightness controls shape the color from dark to bright across two filter stages. Each stage also has its own Resonance control to adjust filter emphasis independently. The Evolve feature adds slow, organic variation so the sound never feels static.

Benefits of Pink Noise

Sleep Quality: Research published in Frontiers in Human Neuroscience found that pink noise synchronized with brain waves enhanced deep sleep and improved memory consolidation in older adults.
Focus and Concentration: A steady, non-distracting sound backdrop helps mask interruptions. Pink noise is particularly effective for studying, reading, and deep work.
Meditation and Mindfulness: Pink noise serves as an excellent anchor for meditation. Its consistent, organic texture provides a stable sonic foundation without distracting variations.
Tinnitus Relief: Many tinnitus sufferers find that pink noise helps mask the perception of ringing or buzzing, providing relief especially at bedtime.
Soothing for Babies: The low-frequency emphasis of pink noise resembles sounds heard in the womb, making it effective for calming infants and promoting sleep.

How to Use This Pink Noise Generator

Press Listen to start generating pink noise directly in your browser — no download or account needed.

Volume — Controls overall loudness. For sleep, keep it at a level where you can comfortably talk over it.
Character (0–5) — Six tonal presets that set the overall filter character. Each shapes both filters differently for a distinct sound.
Brightness — There are two brightness sliders, one per filter stage. Low values sound darker; high values sound brighter.
Resonance (per stage) — Each brightness stage has its own resonance slider. Lower values are smoother, higher values are more focused and textured.
Evolve — Press Evolve next to either brightness control to enable organic drift. A speed dial controls drift rate, and one range slider sets the upper drift limit.

Frequently Asked Questions

Is pink noise safe to listen to all night?

Yes, pink noise is generally safe for extended listening at moderate volumes. A good rule of thumb: if you need to raise your voice to be heard over it, it's too loud.

Can pink noise help with ADHD?

Some research suggests that ambient noise can improve focus in people with ADHD by providing steady auditory input. Try darker brightness settings with moderate resonance on both stages for a deep, immersive sound.

What's the best noise color for studying?

It depends on personal preference. Start with a Character preset you like, then fine-tune both brightness controls and both resonance sliders. The Evolve feature keeps the sound interesting over long study sessions.

Does this work on mobile?

Yes. The generator works in any modern browser on iOS, Android, and desktop. It uses the Web Audio API — no streaming or data usage after the page loads.

Is this really free?

Completely free, no account required. Listen to Noise is an independent project. The generator runs entirely in your browser.