New here? The complete sleep-sounds guide is the long version of all four in one sheet, and the bedtime calculator runs free in your browser. None of it is medical advice — sound masks noise, and chronic sleeplessness belongs with a clinician.
§ VIII — Notes
Notes on the hours
nobody else is awake for.
Plain writing on the four things that decide whether sound helps you sleep: which texture to choose, what the research does and does not show, the three in the morning wake, and what any of it should cost.
- White noise, pink noise, brown noiseThe colours translated out of physics: what each one sounds like, why brown usually wins for a full night, and the test that beats any five-minute audition.2026
- Does white noise actually help you sleep?The research on noise as a sleep enhancer is mixed and small; the case for masking is dull and solid. An honest read, with the volume and dependency caveats the advertisements skip.2026
- Waking at three in the morningBrief night wakings are normal architecture — staying awake is the trap. The clock-arithmetic problem, the twenty-minute rule, and the two sound tricks that stop a wake sticking.2026
- A sleep-sound app without the subscriptionWhat the job actually requires, which free options genuinely work, when a subscription is the fair shape — and the one thing that decides whether a sound app needs one at all.2026