Best sounds for sleep: what helps different people unwind?

It might seem counterintuitive to add noise to a room when you're trying to sleep. However, silence isn't always golden. In a perfectly quiet room, your brain becomes hyper-sensitive to sudden changes in the acoustic environment—like a dog barking, a door slamming, or a car driving by.

Good sounds to sleep to work through a process called sound masking. By introducing a steady, predictable background noise, the difference between the baseline room noise and sudden interruptions is drastically reduced. Your brain no longer perceives the sudden sounds as a threat, allowing you to sleep undisturbed.

White noise is perhaps the most famous sleep sound. It contains all audible frequencies played at an equal intensity, resulting in a "hushing" sound similar to a fan or TV static. Because it spans the entire frequency spectrum, it is incredibly effective at blocking out a wide range of external noises.

Best for: City dwellers, light sleepers, and people trying to sleep in unpredictable environments like hotels or hospitals. If you're looking for the most reliable noise to help you sleep through loud interruptions, white noise is your best bet.

If white noise sounds too sharp or harsh for you, you might prefer Pink Noise or Brown Noise. Pink noise emphasizes lower frequencies, sounding more like steady rainfall or wind. Brown noise goes even deeper, removing high frequencies almost entirely to create a low, rumbling sound like distant thunder or an airplane cabin.

Many recent studies suggest that pink noise can actually enhance the quality of deep sleep by syncing with your brain waves. Brown noise, on the other hand, is increasingly popular in the ADHD community for its ability to "quiet" racing thoughts at bedtime.

For many people, mechanical hums or static sounds don't feel relaxing. This is where nature sounds shine. The sound of rain, gentle ocean waves, or a crackling fire provides both masking benefits and emotional comfort.

Our brains are hardwired to associate the sound of rain with safety and shelter. These organic, non-threatening sounds tell your nervous system that there's no need to stay alert, making them some of the very best sounds to sleep to if anxiety is keeping you awake.

There is no single universal answer to what makes you sleep better. To find your ideal bedtime audio, try these tips:

• Identify your main problem: If your issue is external noise (traffic, snoring partners), lean towards White or Pink noise. If your issue is internal (racing thoughts, anxiety), try Brown noise or Nature sounds.
• Mix your own soundscape: With an app like Calma, you don't have to choose just one. You can blend a deep brown noise with a layer of light rain to get both masking and emotional comfort.
• Keep the volume safe: Sleep sounds should stay in the background. Keep the volume below 50 decibels (about the volume of a quiet conversation) to protect your hearing and prevent your brain from being overstimulated.
• Give it a few nights: It can take your brain a few days to adjust to a new sleep routine. Test a sound for at least 3 nights before deciding if it works for you.