Even with those perfectly plush hotel beds, it can be hard to feel truly rested away from home. An increasingly popular remedy is “colored” noises, which refer to different sound frequencies in the way colors correspond to different light frequencies. Each brings its own benefits, but across the board, habitual listening can enhance relaxation, focus and cognition.
White Noise
Perhaps the most widely known colored noise, white noise is the even tone of all frequencies in the sound spectrum at equal volume, such as a fan or radio static. Its consistent background noise is helpful for light sleepers and can improve focus and
information retention.
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Pink Noise
Pink noise features louder low frequencies and softer mid-to-high frequencies, like the inside of an airplane cabin. It works well for falling and staying asleep, and can boost memory if you listen to it while sleeping. It can also enhance productivity. Try it out to get some work done in a noisy environment on the road.
Green Noise
Green noise emphasizes frequencies in the middle of the sound spectrum, with higher and lower frequencies at a lower amplitude. Think of the sound of rolling waves. A calming background noise, it helps enhance relaxation while simultaneously
boosting focus. Great for creative work or studying, it can even soothe symptoms of anxiety.
Blue Noise
With higher frequencies at a higher amplitude and lower frequencies at a lower amplitude, like the sound of a computer fan, blue noise is the opposite of brown noise. The pronounced higher frequencies create a sense of energy to improve focus, mental clarity, concentration and alertness.
Brown Noise
Brown noise is the next level down, with emphasis on the low frequencies and high frequencies barely audible. Think of thunder or a purring cat. Brown noise improves sleep, particularly deep sleep, and is great for relaxation. You can also use it to stretch your attention span and enhance your focus.
Violet Noise
The next level up is violet noise, with the highest frequencies most pronounced—you get the pattern by now. It sounds like a sizzle, or a hiss. Its crisp sound can help you stay awake and alert and is ideal for memory function, focus and attention span.
