This produces noise at higher and lower frequencies but not so much in the middle frequencies. It’s often used to treat tinnitus, a condition that causes loud ringing in one or both ears. It’s one of the higher-pitched color noises. The volume goes up when the frequency does and it gains power faster than blue noise. Also called purple noise, it’s the opposite of brown noise. Imagine the hissing noise you hear when a water spray is turned on. Blue noise sounds slightly shriller than pink and white noise. Its power increases as the frequency goes up. Other Colors of Noiseīesides white, pink, and brown noise, there are other color noises that aren’t related to sleep. More research is needed to see if and how brown noise affects sleep. It’s also shown to improve your thinking skills. Studies show that brown noise might help lower symptoms if you have ringing in your ears. Some sleep apps use this sound instead of pink noise to give it a deeper, grainier effect. It’s similar to a steady heavy rainfall or a shower with good pressure. The sound level (decibels) decreases as the frequency goes up more than it does in pink noise. Brown Noiseīrown noise, also called red noise, produces a rumbling sound that’s deeper with a bass-like tone than pink or white noise. As a result, you hear more relaxing, lower-frequency sounds. Its added depth and lower waves filter out higher sounds. Pink noise uses a consistent frequency, or pitch, to create a more even, flat sound, like a steady rain, wind rustling through trees, or waves on a beach. Basically, pink has a lower pitch than white noise. But it uses deeper sounds and lower sound waves, so it may be gentler and more soothing. Like white noise, it’s a steady background hum that may give you a better night’s sleep. It filters out things that distract you, like people talking or cars going by, so they don’t interrupt your sleep. Pink noise is a constant sound in the background. Other studies have found that many people find that white noise has a positive effect on them.
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