Sound for Focus, 9 hours Natural White Noise from Sweden - Brissund, Gotland

Recorded at Brissund, Gotland, where the sea moves against the shore in the kind of unhurried rhythm that's hard to find inland.

Why it works

Wave rhythm is naturally hypnotic — regular enough to be predictable, irregular enough not to feel mechanical. That's the same quality that makes coastal recordings such a reliable choice for sleep.

How to use it

Let the rhythm establish itself in the first few minutes; most people find it fades into the background quickly after that.