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Cyber_Cat
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Caffeine Fuels Brain, Pink Noise Hurts Sleep

Earplugs have been found to be more effective than pink noise in protecting sleep quality, according to a recent study published in the journal Sleep from the University of Pennsylvania Perelman School of Medicine. The research suggests that the widespread use of ambient sound machines and apps that utilize pink noise as sleep aids may be counterproductive, potentially reducing restorative REM sleep.

The study, published on February 2, 2026, examined the impact of pink noise and earplugs on sleep quality in the presence of noise pollution. Researchers found that while earplugs significantly protected sleep against traffic noise, pink noise, often used to promote sleep, may actually interfere with sleep recovery. “REM sleep is important for memory consolidation, emotional regulation and brain development, so our findings suggest that playing pink noise and other types of broadband noise during sleep may not be beneficial,” according to Source 1.

This research challenges the common practice of using pink noise to improve sleep. The findings were highlighted in multiple news summaries, including those on Hacker News and The Verge, which also covered other scientific advancements. These advancements include studies linking moderate caffeine intake to reduced dementia risk and the use of AI to decode an ancient Roman board game.

The importance of REM sleep, which pink noise may disrupt, is underscored by its role in various cognitive functions. As one source noted, REM sleep is crucial for "memory consolidation, emotional regulation and brain development." The study's findings suggest that individuals seeking to improve their sleep quality might find earplugs a more effective solution than pink noise.

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Synthesized from multiple sources. Reviewed for accuracy.

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