If you use white noise to sleep or focus, you may have noticed a faint bump, click or swoosh every so often. That's the loop: most apps and many bedside machines play a short audio recording on repeat. Once your brain spots the pattern, it keeps listening for it.
Why most white noise loops
Recording sound is easy, so many products ship a clip that's anywhere from a few seconds to a few minutes long and replay it all night. Even with a smooth crossfade, the same gusts, drops and crackles come back in the same order.
The fix: generate the sound live
Noise doesn't have to be recorded. White, pink and brown noise are mathematical signals, and rain, ocean and fan sounds can be built from them with filters and gentle randomness. Generated in real time, the sound is never the same twice, so there's no seam to notice.
Which color of noise to try
- White noise: bright and even, like TV static. Good for masking voices.
- Pink noise: softer, with less hiss. Many people find it the most comfortable for sleep.
- Brown noise: deep and rumbly, like a distant waterfall. Popular for focus.
- Rain, ocean, fan: natural textures built on the same noise, for when plain static feels too flat.
Keep the light warm
If you also use a night light, pick amber or red over bright white or blue. Warm, dim light is easier on your eyes in a dark bedroom.
Try it free
Arkawave Ionics is a free white noise machine that runs in your browser. It generates every sound live, so it never loops. It also has a sleep timer that fades out gently and a warm night-light mode. No app or signup needed.
Open the free white noise machine →
Arkawave Ionics is not a medical device. If you have ongoing trouble sleeping, talk to a doctor.