The key difference
White noise has equal energy at every frequency, giving it a bright, hiss-like character. Pink noise reduces the high frequencies by 3 dB per octave, so it has equal energy per octave — the way human hearing is organised — and sounds balanced and natural, like steady rain. Pink is essentially a warmer, softer white.
- White noise: brighter, fuller, widest masking.
- Pink noise: softer, natural, rain-like; more sleep research behind it.
Which should you choose?
Choose pink noise for sleep and relaxation — it is gentler on the ears and is the most research-backed color for deep sleep. Choose white noise when you need to mask the widest range of sounds, such as a very noisy environment. For most bedtime use, pink noise is the more comfortable pick.