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  2. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    The receiver was mounted on the head by a clamp which held it next to the ear. [9] The head mount freed the switchboard operator's hands, so that they could easily connect the wires of the telephone callers and receivers. [10] The head-mounted telephone receiver in the singular form was called a headphone. [11] [12] These head-mounted phone ...

  3. Handset - Wikipedia

    en.wikipedia.org/wiki/Handset

    A handset is a component of a telephone that a user holds to the ear and mouth to receive audio through the receiver and speak to the remote party using the built-in transmitter. In earlier telephones, the transmitter was mounted directly on the telephone itself, which was attached to a wall at a convenient height or placed on a desk or table.

  4. Helmet-mounted display - Wikipedia

    en.wikipedia.org/wiki/Helmet-mounted_display

    30 mm M230 chain gun turret on a Boeing AH-64 Apache being aimed with a helmet-mounted sight. A helmet-mounted display ( HMD) is a headworn device that uses displays and optics to project imagery and/or symbology to the eyes. [ 1][ 2][ 3] It provides visual information to the user where head protection is required – most notably in military ...

  5. Head-mounted display - Wikipedia

    en.wikipedia.org/wiki/Head-mounted_display

    Head-mounted display. A head-mounted display ( HMD) is a display device, worn on the head or as part of a helmet (see helmet-mounted display for aviation applications), that has a small display optic in front of one ( monocular HMD) or each eye ( binocular HMD). HMDs have many uses including gaming, aviation, engineering, and medicine.

  6. Base transceiver station - Wikipedia

    en.wikipedia.org/wiki/Base_transceiver_station

    Base transceiver station. A base transceiver station ( BTS) or a baseband unit [1] (BBU) is a piece of equipment that facilitates wireless communication between user equipment (UE) and a network. UEs are devices like mobile phones (handsets), WLL phones, computers with wireless Internet connectivity, or antennas mounted on buildings or ...

  7. Radio receiver - Wikipedia

    en.wikipedia.org/wiki/Radio_receiver

    Later receivers in commercial wireless systems used a Morse siphon recorder, [22] which consisted of an ink pen mounted on a needle swung by an electromagnet (a galvanometer) which drew a line on a moving paper tape. Each string of damped waves constituting a Morse "dot" or "dash" caused the needle to swing over, creating a displacement of the ...

  8. Tower Mounted Amplifier - Wikipedia

    en.wikipedia.org/wiki/Tower_Mounted_Amplifier

    A Tower Mounted Amplifier (TMA), or Mast Head Amplifier (MHA), is a low-noise amplifier (LNA) mounted as close as practical to the antenna in mobile masts or base transceiver stations. A TMA reduces the base transceiver station noise figure (NF) and therefore improves its overall sensitivity ; in other words the mobile mast is able to receive ...

  9. List of virtual reality headsets - Wikipedia

    en.wikipedia.org/wiki/List_of_virtual_reality...

    Standalone – devices that have all necessary components to provide virtual reality experiences integrated into the headset. Mainstream standalone VR platforms include: Oculus Mobile SDK, developed by Oculus VR for its own standalone headsets and the Samsung Gear VR. (The SDK has been deprecated in favor of OpenXR, released in July 2021.)

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