Pink Noise vs White Noise — Equal Energy Per Octave

Most people discover pink noise after white noise. They've been using white noise for sleep or focus, it works okay, and then someone mentions pink noise and they wonder what the difference actually is.

The difference is real — but it's subtle enough that plenty of people try both and genuinely can't decide. Here's how to think about it properly.

The actual difference in sound

White noise contains every audible frequency at equal volume — from the lowest bass rumble up to the highest hiss your ears can detect. That equal distribution is what gives it that bright, slightly harsh quality. It sounds like static, a detuned radio, or a loud fan.

Pink noise has equal energy per octave rather than per frequency. Because there are more high frequencies than low ones in the audible range, giving each octave equal energy means the lower frequencies end up louder. The result is a sound that's noticeably warmer and more balanced — most people describe it as sounding like steady rainfall, a river, or rustling leaves.

In practice: if you find white noise slightly grating or clinical, you'll probably prefer pink. If white noise works fine for you, you might not notice enough difference to bother switching.

Try pink noise → · Try white noise →

For sleep

This is where they differ most meaningfully.

White noise is the better masker. Its even distribution across frequencies means it covers a wider range of the sounds that might disrupt your sleep — from low-frequency traffic rumble to high-pitched pipes. If you're a light sleeper who gets woken by sounds, white noise has a slight edge here.

Pink noise has better research for sleep quality. A 2017 study found that pink noise played during slow-wave sleep enhanced deep sleep and improved next-day memory. The effect on sleep quality — not just falling asleep, but how restorative your sleep actually is — is where pink noise pulls ahead.

If you're choosing between them for sleep: white noise if sound masking is your main issue, pink noise if you want to improve the depth and quality of sleep itself.

For babies

White noise has a much longer track record here, and most sleep training resources recommend it specifically. The theory is that it resembles the womb's sound environment (which is louder than you'd think — closer to a busy restaurant than a quiet bedroom).

Pink noise works fine for babies too, but there's simply less research on it in this context. If you're starting fresh with a newborn, white noise is the safer starting point. If white noise isn't settling them, pink noise is a reasonable next thing to try.

Read the full white noise for babies guide →

For focus and work

Neither pink nor white noise has a big edge here — brown noise tends to be the favourite for focus, particularly among people with ADHD. But if you're choosing between pink and white for a work background:

White noise is slightly better at masking speech and office chatter, which makes it more useful in open-plan environments or cafés.

Pink noise is more pleasant for long sessions — it's less fatiguing on the ears, and many people find they can listen to it for 4+ hours without it becoming irritating.

The honest answer

If you've never tried either: start with brown noise for focus and white noise for sleep — these are the most-used and most-studied options. Once you know how noise in general works for you, trying pink noise as a comparison is worthwhile.

Most people who try pink noise either love it immediately or feel it's basically the same as white. Very few people actively dislike it. At zero cost to try, it's an easy experiment.

Pink noise → · White noise → · All noise colours →