How we judged it
We use every tool for at least three weeks, including on genuinely bad nights, and we score it on four things: how many taps it takes to get help when you are already distressed, whether the content is grounded in something more than vibes, whether the pricing is honest, and whether we still reach for it after the novelty wears off.
Two different jobs, often confused
Sound at night does one of two things, and buying the wrong one is why people say it did not work for them.
Masking raises the background sound floor so that intermittent noises — a door, traffic, a neighbour’s television — no longer stand out sharply enough to wake you. Continuous, featureless sound does this well. Distraction gives a busy mind something to attend to instead of its own content. That needs sound with some structure: a voice, music, or a gently evolving soundscape.
If your problem is a noisy street, buy masking. If your problem is your own thoughts, masking will bore you and you need something with content. Many people buy a white noise machine for a thoughts problem and conclude sound does not help them.
White, pink and brown, briefly
White noise has equal energy across frequencies and sounds like a hiss — most effective at masking, least pleasant to many ears. Pink noise reduces the higher frequencies and sounds like steady rain; it is the most popular compromise. Brown noise cuts the highs further and sounds like a distant waterfall or heavy wind, which people with sound sensitivity often prefer. There is no meaningful evidence that one is therapeutically superior. Choose the one you find least irritating — that is the whole selection criterion.
A machine or an app?
A dedicated machine costs more but keeps your phone out of the bedroom, and that is a real benefit rather than a technicality. An app is free but hands you the device with everything else on it. If you use an app, download the audio, switch to aeroplane mode, and put the phone face-down across the room. A cheap fan, incidentally, does a perfectly good masking job and also cools the room, which helps independently.
Who should actually buy one
Buy a machine if external noise is waking you, or you sleep somewhere noisy and cannot change it. Buy a soundscape subscription instead if the problem is your own thoughts. Skip both if you already sleep best in silence — some people do, and adding sound will make things worse.
Sources
- Sleep Foundation — consumer sleep health reference material and product testing methodology.
- National Heart, Lung, and Blood Institute (NIH) — sleep deprivation and deficiency overview.