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

White noise contains equal energy across all frequencies, sounding like static. Pink noise has more bass and less treble (-3dB/octave), sounding like rainfall. Brown noise has even more bass (-6dB/octave), sounding like a deep rumble or waterfall. Blue and violet noise are the opposite, with more high-frequency content.

What noise color is best for sleep?

Most people find pink or brown noise best for sleep. Pink noise mimics natural sounds like rain and has been shown in studies to improve deep sleep. Brown noise is even deeper and can feel more enveloping. Experiment with our sleep presets to find what works for you.

What are binaural beats?

Binaural beats occur when slightly different frequencies are played in each ear, and your brain perceives a third tone at the difference frequency. For example, 200Hz in one ear and 210Hz in the other creates a perceived 10Hz beat. Different frequencies are associated with different mental states: Delta (1-4Hz) for deep sleep, Theta (4-8Hz) for meditation, Alpha (8-12Hz) for relaxation, and Beta (12-40Hz) for focus.

Is this noise generator free?

Yes, this noise generator is completely free with no ads, no sign-up required, and no usage limits. All 50+ presets and features are available at no cost.

Colored Noise | Free White, Pink & Brown Noise Generator for Sleep & Focus

Spectrum Analyzer

Presets

Sleep Focus Nature Ambient Mechanical Experimental

Master Volume 50%

Sound Settings

Noise Color Pink

Violet Blue White Pink Brown

Pulse Speed Off

Pulse Shape

Texture

Grey Noise (Perceptual EQ)

Binaural Mode

Binaural Frequency 10 Hz

Delta Theta Alpha Beta

Fade Settings

Fade In 1s

Fade Out 2s

Sleep Timer

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Save Custom Preset

Space Play/Pause ↑↓ Volume 1-9 Presets