White noise has become one of the most searched sleep topics in the last two years — and for good reason. It works. But most people using it are still making one mistake that cuts its effectiveness in half.
Here's everything you need to know about sleeping with white noise, plus what side sleepers specifically need to make it work all night.
Why White Noise Helps You Sleep
White noise works through a principle called sound masking. Instead of creating silence, it creates a consistent background hum that drowns out the sudden, jarring sounds that pull you out of deep sleep — a car outside, a door closing, a partner snoring.
Your brain is wired to respond to changes in sound, not constant sound. White noise eliminates the contrast, so sudden noises don't register as threats and your brain stays in deeper sleep stages longer.
Studies show people fall asleep significantly faster with white noise, and wake up fewer times throughout the night.
The Mistake Most People Make
Most people use a white noise machine or phone speaker across the room. The problem? The volume has to be high enough to reach you — which means it's loud enough to disturb a partner, and the sound quality degrades with distance.
The most effective white noise is delivered close to your ears, at a low volume. This is both more effective for sleep and safer for your hearing long-term.
The Problem for Side Sleepers
Earbuds are the obvious solution — but they're a nightmare for side sleepers. Even the smallest earbuds create pressure against the ear canal when your head is sideways on a pillow. Most people can handle it for 20-30 minutes before the discomfort wakes them up.
This is exactly why flat, integrated speakers in a sleep mask are the best solution for side sleepers who want white noise. The speakers sit against — not inside — your ear, at an angle that doesn't create pressure when you roll to your side.
Best Sounds for Sleep (Beyond Just White Noise)
- White noise — broadband, consistent, great for blocking all frequencies
- Pink noise — softer than white noise, many people find it more natural
- Rain sounds — one of the most popular sleep sounds globally, rhythmic and calming
- Brown noise — deeper rumble, popular for people with racing thoughts
- Sleep stories — occupies the narrative part of your brain so it stops running loops
Any of these can be played directly through RestMask's Bluetooth connection — from Spotify, YouTube, Calm, or any app on your phone.
RestMask + White Noise = Deep Sleep for Side Sleepers
RestMask pairs full blackout coverage with ultra-thin speakers designed to lay flat against your ear even when you're on your side. Run any white noise app you already use — no separate machine needed, no earbuds digging into your ears.
10-hour battery. Bluetooth 5.0. Rated 4.8/5 by side sleepers.
Free shipping. 30-day returns. Shop RestMask.