Thousands of people listen to coloured sounds on platforms like YouTube and through meditation apps White noise, a sound that can drown out background noise and increase sleep quality, has gained popularity in recent years as many people seek improved rest and focus. There’s now growing interest in other coloured noises such as pink, brown and green noises. Scientists say sound consists of waves, similar to light. It can be described using colours based on the distribution of its frequencies just like light appears red at lower wavelengths, while it is more blue and violet at higher wavelengths. Thousands of people listen to these sounds on platforms like YouTube and through meditation apps. With potential benefits for sleep, concentration and relaxation, the coloured noises provide different auditory experiences. While white noise is often described as a static-like sound, brown noise has deeper rumbling tones. Green noise sits between white and brown noise in frequency. . Most of these applications and programs and devices use continuous sounds, which are helpful to mask external noises and allow people to sleep better by not being disturbed by other sounds around them benefits for sleep, concentration and relaxation, the coloured noises provide different auditory experiences. While white noise is often described as a static-like sound, brown noise has deeper rumbling tones. Green noise sits between white and brown noise in frequency. reason why we use pink noise is because the distribution of sound frequencies mirrors the distribution of brainwave frequencies we see on the brainwave tests on a sleep study during slow wave sleep. What we’re trying to do with this research is to stimulate or boost slow-wave sleep, which is one form of deep sleep. And pink noise mirrors the types of frequencies seen in that stage of sleep
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Tuesday, March 10, 2026