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Why Can't Some People Sleep Without a Fan?

December 15, 20174 min
Some people find it impossible to sleep without background noise, like a fan whirring. Researchers have identified the possible culprit. Learn how it works in this episode of BrainStuff.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices