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2. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Wireless headphones. Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open ...

3. The best wireless headphones for seniors - AOL

   www.aol.com/lifestyle/best-wireless-headphones...

   Sony WH-CH720N Noise-Cancelling Wireless Headphones. Best Sony XM5 headphones alternative. $98 at Adorama. Earbuds are easily lost, too, but just try misplacing a full-size headphone. Below I've ...

4. Beats Electronics - Wikipedia

   en.wikipedia.org/wiki/Beats_Electronics

   Beats Electronics LLC. Beats Electronics LLC (also known as Beats by Dr. Dre, or simply Beats by Dre) is an American consumer audio products manufacturer headquartered in Culver City, California. [1] [2] The company was founded in 2006 by music producer Dr. Dre and record company executive Jimmy Iovine. Since 2014, it has been an Apple subsidiary.

5. Carbon-14 - Wikipedia

   en.wikipedia.org/wiki/Carbon-14

   Carbon-14, C-14, 14. C or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons. Its presence in organic materials is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues (1949) to date archaeological, geological and hydrogeological samples.

6. Carbon fibers - Wikipedia

   en.wikipedia.org/wiki/Carbon_fibers

   Carbon fibers or carbon fibres (alternatively CF, graphite fiber or graphite fibre) are fibers about 5 to 10 micrometers (0.00020–0.00039 in) in diameter and composed mostly of carbon atoms. Carbon fibers have several advantages: high stiffness, high tensile strength, high strength to weight ratio, high chemical resistance, high-temperature ...

7. Carbon tetrafluoride - Wikipedia

   en.wikipedia.org/wiki/Carbon_tetrafluoride

   Tetrafluoromethane is the product when any carbon compound, including carbon itself, is burned in an atmosphere of fluorine. With hydrocarbons, hydrogen fluoride is a coproduct. It was first reported in 1926. [6] It can also be prepared by the fluorination of carbon dioxide, carbon monoxide or phosgene with sulfur tetrafluoride.