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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. List of virtual reality headsets - Wikipedia

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

    DisplayPort 1.3, USB 3.0 type C, power adapter 499 g $599 No Yes No No Yes Yes No No 6DoF dual controllers tracked by HMD Yes HTC Vive Pro 2 2021-06-04 Yes LCD 2448x2448 20.4 1:1 90 Hz 120 Hz 120° Built-in headphones (removable) USB-C 3.0 Bluetooth, USB-C, DisplayPort 1.2 850 g $800 No Yes No No Yes No No No 6DoF dual controllers,

  4. Phone connector (audio) - Wikipedia

    en.wikipedia.org/wiki/Phone_connector_(audio)

    Phone connector (audio) Phone plug mated in a phone socket. The plug's grooved tip is held firmly by the socket's spring tip contact. When not mated, this spring instead connects to the flat switch contact for detecting a plug. A phone connector is a family of cylindrically -shaped electrical connectors primarily for analog audio signals.

  5. Television antenna - Wikipedia

    en.wikipedia.org/wiki/Television_antenna

    A television antenna, also called a television aerial (in British English ), is an antenna specifically designed for use with a television receiver (TV) to receive terrestrial over-the-air (OTA) broadcast television signals from a television station. Terrestrial television is broadcast on frequencies from about 47 to 250 MHz in the very high ...

  6. 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.

  7. Miracast - Wikipedia

    en.wikipedia.org/wiki/Miracast

    Miracast is a wireless communications standard created by the Wi-Fi Alliance which is designed to transmit video and sound from devices (such as laptops or smartphones) to display receivers (such as TVs, monitors, or projectors). It uses Wi-Fi Direct to create an ad hoc encrypted wireless connection [ 1] and can roughly be described as " HDMI ...

  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. Cathode-ray tube - Wikipedia

    en.wikipedia.org/wiki/Cathode-ray_tube

    In 1926, Kenjiro Takayanagi demonstrated a CRT TV receiver with a mechanical video camera that received images with a 40-line resolution. [22] By 1927, he improved the resolution to 100 lines, which was unrivaled until 1931. [23] By 1928, he was the first to transmit human faces in half-tones on a CRT display. [24]

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