Pink noise is what you get when white noise grows up. Same masking benefit, but the energy is weighted toward lower frequencies — so it sounds softer, warmer, and less hissy. Many people find it the easiest noise color to fall asleep to.
The science is interesting
A handful of small studies have linked pink noise to improvements in deep (slow-wave) sleep, particularly in older adults, and even to better memory consolidation overnight. The research is still early and the effect sizes are modest, but it's enough to put pink noise on the radar of sleep researchers as more than just "softer white noise."
What pink noise sounds like
If white noise sounds like a hissing waterfall, pink noise sounds like a steady, distant downpour. It has the same uniform "shhhh" quality but without the sharp high-frequency edge. People who find white noise irritating often gravitate toward pink — same masking benefit, more pleasant to listen to.
Best for these situations
White or pink — which to start with? If you've never used a noise machine, try white noise first; it's the most-tested for sleep generally. If you find white noise too sharp or wake from it, switch to pink. Most people end up preferring one over the other within a week.
Pair with the right light
Pink noise pairs nicely with most warm-toned glows — try warm white or a soft pink color for an evening with consistent vibes. For deep sleep, add the sleep timer.