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2. 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 ...

3. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Headphones are also known as earphones[1] or, colloquially, cans. [2] Circumaural (around the ear) and supra-aural (over the ear) headphones use a band over the top of the head to hold the drivers in place. Another type, known as earbuds or earpieces, [1] consists of individual units that plug into the user's ear canal.

4. Ray J - Wikipedia

   en.wikipedia.org/wiki/Ray_J

   This is the latest accepted revision, reviewed on 28 September 2024. William Ray Norwood Jr. (born January 17, 1981), [ 1 ] known professionally as Ray J, is an American R&B singer, songwriter, television presenter, and actor. Born in McComb, Mississippi and raised in Carson, California, he is the younger brother of singer and actress Brandy.

5. 8 Headphones You Can Comfortably Wear to Sleep - AOL

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

   Sleep PROxs. Bonamour's sleep buds are upping the ante when it comes to incorporating the latest in sleep science. These teeny tiny buds connect to the Bonamour app, which has a library of ...

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. Sleep - Wikipedia

   en.wikipedia.org/wiki/Sleep

   Sleep. Sleeping Girl, Domenico Fetti, c. 1615. Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. During sleep, there is a marked decrease in muscle activity and interactions with the surrounding environment.