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2. 8 Headphones You Can Comfortably Wear to Sleep - AOL

   www.aol.com/8-headphones-comfortably-wear-sleep...

   From teeny tiny sleep buds to speakers built into headbands, these are the best headphones to wear to bed in 2023.

3. Headache - Wikipedia

   en.wikipedia.org/wiki/Headache

   Headache, also known as cephalalgia, is the symptom of pain in the face, head, or neck. It can occur as a migraine, tension-type headache, or cluster headache. [1][2] There is an increased risk of depression in those with severe headaches. [3] Headaches can occur as a result of many conditions. There are a number of different classification ...

4. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Noise-cancelling headphones are headphones that suppress unwanted ambient sounds using active noise control (ANC). Active noise cancellation makes it possible to listen to audio content without raising the volume excessively. In an aviation environment, noise-cancelling headphones increase the signal-to-noise ratio significantly more than ...

5. Are Noise-Canceling Headphones Harmful to Your Ears? - AOL

   www.aol.com/noise-canceling-headphones-harmful...

   You've probably heard about noise-canceling technology in headphones but many people wonder if the technology actually helps or hurts your ears?

6. Unihemispheric slow-wave sleep - Wikipedia

   en.wikipedia.org/wiki/Unihemispheric_slow-wave_sleep

   Unihemispheric slow-wave sleep (USWS) is sleep where one half of the brain rests while the other half remains alert. This is in contrast to normal sleep where both eyes are shut and both halves of the brain show unconsciousness. In USWS, also known as asymmetric slow-wave sleep, one half of the brain is in deep sleep, a form of non-rapid eye ...

7. These noise-canceling headphones are just as good as AirPods ...

   www.aol.com/article/lifestyle/2021/01/15/aukey...

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