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  2. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    Headphones that use cables typically have either a 1 ⁄ 4 inch (6.4 mm) or 1 ⁄ 8 inch (3.2 mm) phone jack for plugging the headphones into the audio source. Some headphones are wireless, using Bluetooth connectivity to receive the audio signal by radio waves from source devices like cellphones and digital players. [5]

  3. Sennheiser - Wikipedia

    en.wikipedia.org/wiki/Sennheiser

    Sennheiser electronic GmbH & Co. KG (/ ˈ z ɛ n h aɪ z ər /, German pronunciation: [zɛnˈhaɪ̯zɐ]) is a German audio equipment manufacturer headquartered in Wedemark. Sennheiser specializes in equipment for both the consumer and professional audio markets, including microphones, headphones, and loudspeakers.

  4. Dolby Atmos - Wikipedia

    en.wikipedia.org/wiki/Dolby_Atmos

    On the Xbox One, Crackdown 3 and Gears of War 4 support Atmos. [44] Dolby Atmos for Music, an audio-only iteration of the format was adopted by streaming music services Tidal (uses E-AC3) and Amazon Music in December 2019. [45] Sennheiser launched a new sound bar with built-in Dolby Atmos technology named AMBEO sound bar at the 2019 CES in Las ...

  5. Four-momentum - Wikipedia

    en.wikipedia.org/wiki/Four-momentum

    In special relativity, four-momentum (also called momentum–energy or momenergy [1]) is the generalization of the classical three-dimensional momentum to four-dimensional spacetime. Momentum is a vector in three dimensions ; similarly four-momentum is a four-vector in spacetime .

  6. Manual (music) - Wikipedia

    en.wikipedia.org/wiki/Manual_(music)

    The word "manual" is used instead of the word "keyboard" when referring to any hand-operated keyboard on a keyboard instrument that has a pedalboard (a keyboard on which notes are played with the feet), such as an organ; or when referring to one of the keyboards on an instrument that has more than one hand-operated keyboard, such as a two- or ...

  7. Relativistic angular momentum - Wikipedia

    en.wikipedia.org/wiki/Relativistic_angular_momentum

    For reference and background, two closely related forms of angular momentum are given. In classical mechanics, the orbital angular momentum of a particle with instantaneous three-dimensional position vector x = (x, y, z) and momentum vector p = (p x, p y, p z), is defined as the axial vector = which has three components, that are systematically given by cyclic permutations of Cartesian ...