Noise Affects Your Body While You Sleep
It harms your health even it doesn’t wake you up.
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It doesn’t take a lot: Once the noise reaches 50 decibels, every 10-decibel increase can significantly raise your risk of heart failure and stroke with regular exposure over the years, the authors found. (The difference between 50 and 60 decibels is equivalent to a conversation at home versus one in a restaurant.) Daytime noises are harmful too, though it's unclear why they're more detrimental at night.
If you live near a highway or otherwise busy road, the study suggests you close your windows when you go to bed. Münzel also recommends sleeping with earplugs or turning on a white noise machine. The device is just as loud as a distant airplane but the study suggests it won’t trigger stress hormones, potentially because of the frequency and consistency of the sound.
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