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  2. Ray J - Wikipedia

    en.wikipedia.org/wiki/Ray_J

    William Ray Norwood Jr. (born January 17, 1981), [1] known professionally as Ray J, is an American R&B singer, songwriter, television personality, and actor. Born in McComb, Mississippi, and raised in Carson, California, he is the younger brother of singer and actress Brandy Norwood. [3] In January 2017, he competed in the nineteenth season of ...

  3. These earbuds are on sale for Mother’s Day - AOL

    www.aol.com/news/earbuds-sale-mother-day...

    TL;DR: Through May 2, you can save 20% on Raycon earbuds or speakers by using the Mother's Day promo code LOVING at checkout.Mother’s Day is around the corner, and in the realm of tech, earbuds ...

  4. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...

  5. Crystal radio - Wikipedia

    en.wikipedia.org/wiki/Crystal_radio

    Crystal radio. Swedish crystal radio from 1922 made by Radiola, with earphones. The device at top is the radio's cat's whisker detector. A second pair of earphone jacks is provided. 1970s-era Arrow crystal radio marketed to children.

  6. List of Feynman diagrams - Wikipedia

    en.wikipedia.org/wiki/List_of_Feynman_diagrams

    In the Stückelberg–Feynman interpretation, pair annihilation is the same process as pair production. Møller scattering. electron-electron scattering. Bhabha scattering. electron-positron scattering. Penguin diagram. a quark changes flavor via a W or Z loop. Tadpole diagram. One loop diagram with one external leg.

  7. Microphone - Wikipedia

    en.wikipedia.org/wiki/Microphone

    Systems for extracting voice input from ambient noise (notably telephones, speech recognition systems, hearing aids) Surround sound and related technologies. Locating objects by sound: acoustic source localization (e.g. military use to locate the source (s) of artillery fire). Aircraft location and tracking.

  8. Radio spectrum - Wikipedia

    en.wikipedia.org/wiki/Radio_spectrum

    The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz ). Electromagnetic waves in this frequency range, called radio waves, are widely used in modern technology, particularly in telecommunication. To prevent interference between different users, the generation and transmission of radio ...

  9. The Design of Everyday Things - Wikipedia

    en.wikipedia.org/wiki/The_Design_of_Everyday_Things

    The Design of Everyday Things is a best-selling [1] book by cognitive scientist and usability engineer Donald Norman about how design serves as the communication between object and user, and how to optimize that conduit of communication in order to make the experience of using the object pleasurable. One of the main premises of the book is that ...

  10. Reykon - Wikipedia

    en.wikipedia.org/wiki/Reykon

    1. Andrés Felipe Robledo Londoño (born 12 December 1986), [1] better known as Reykon " El Líder " " Pel mazo " , is a reggaeton performer from Colombia. [2] He is considered one of the biggest proponents of Latin America's reggaeton music genre. [3] He is from Envigado, Antioquia. [4]

  11. Use case diagram - Wikipedia

    en.wikipedia.org/wiki/Use_case_diagram

    e. A use case diagram is a graphical depiction of a user's possible interactions with a system. A use case diagram shows various use cases and different types of users the system has and will often be accompanied by other types of diagrams as well. The use cases are represented by either circles or ellipses. The actors are often shown as stick ...