A research team in Freiburg has investigated how random sounds played during sleep affect the consolidation of new memories.

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Sound machines may not be the sleep saviors many believe. Researchers found that pink noise significantly reduced REM sleep, while simple earplugs did a better job protecting deep, restorative sleep ...

Add Yahoo as a preferred source to see more of our stories on Google. Cole Kan/CNET If you're a light sleeper who's sensitive to sound, then you know how difficult it can be to catch some Zs.

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Using a melodic song you enjoy as an alarm sound can potentially reduce feelings of grogginess upon waking. However, waking suddenly from sleep may have negative effects. Many people use an alarm ...