What's the difference between pink, white, and brown noise?

White noise is equal energy across all frequencies (hissing). Pink noise has more bass energy (waterfall-like). Brown noise is even deeper (thunder-like). Most people find pink noise the most pleasant for sleep.

Can pink noise help with insomnia?

Studies show pink noise can increase time spent in deep sleep stages. It's not a cure for clinical insomnia, but it meaningfully helps many people fall asleep faster and sleep more deeply.

Best Pink Noise Machines for Sleep 2026