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In the realm of soundscapes, a new spectrum of colorful noise is emerging, promising unique benefits for sleep quality, concentration, and relaxation. While white noise has long been hailed for its ability to mask background disturbances, the allure of pink, brown, and even green noise is capturing attention, drawing thousands to immerse themselves in these soothing auditory experiences via platforms like YouTube and meditation apps.

Pink noise, a notable contender in this auditory palette, differs from its white counterpart by tempering the harshness of high frequencies, offering a mellower, more natural ambiance akin to rainfall or ocean waves. Brown noise delves even deeper into the low-pitched spectrum, evoking a comforting rumble reminiscent of distant thunder.

Scientific exploration into the effects of color noises is still in its infancy, with only a handful of studies offering insights into their potential impacts. Recent research suggests that both white and pink noise may yield modest benefits for individuals with attention-deficit/hyperactivity disorder (ADHD), providing neural stimulation without cognitive distraction.

"The noise provides stimulation to the brain without providing information, and so it doesn't distract," Joel Nigg, an ADHD researcher from Oregon Health & Science University, explained, ABC News reported.

Researchers at Northwestern University are investigating the potential of brief bursts of pink noise to amplify the slow brain waves associated with deep sleep. Initial findings from small-scale studies suggest that these pulses of pink noise hold promise in bolstering memory and the body's relaxation response.

Pink noise has a frequency profile "very similar to the distribution of brain wave frequencies we see in slow-wave sleep because these are large, slow waves," Dr. Roneil Malkani, an associate professor of neurology at Northwestern University Feinberg School of Medicine, said.

While preliminary findings hint at promising outcomes, Malkani notes the need for further research to unravel the intricacies of this phenomenon. "There's still a lot of work we have to do," he said.

Despite the growing interest in color noises, questions linger regarding their efficacy and safety. Nigg advocates for cautious usage, emphasizing the importance of maintaining quiet listening levels to mitigate the risk of hearing impairment.