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  2. Public address system - Wikipedia

    en.wikipedia.org/wiki/Public_address_system

    Some PA systems have speakers that cover more than one building, extending to an entire campus of a college, office or industrial site, or an entire outdoor complex (e.g., an athletic stadium). A large PA system may also be used as an alert system during an emergency. PA systems by size and subwoofer approach

  3. Municipal wireless network - Wikipedia

    en.wikipedia.org/wiki/Municipal_wireless_network

    A municipal wireless network is a citywide wireless network. This usually works by providing municipal broadband via Wi-Fi to large parts or all of a municipal area by deploying a wireless mesh network. The typical deployment design uses hundreds of wireless access points deployed outdoors, often on poles.

  4. Optical wireless communications - Wikipedia

    en.wikipedia.org/wiki/Optical_Wireless...

    The wide-scale deployment of radio-frequency technologies was a key factor in the expansion of wireless devices and systems. However, the portion of the electromagnetic spectrum used by wireless systems is limited in capacity, and licenses to use parts of the spectrum are expensive. With the rise in data-heavy wireless communications, the ...

  5. In a time before PA systems, rodeos used a guy with a loud ...

    www.aol.com/time-pa-systems-rodeos-used...

    Think back to a time before public address systems. You have an event that needs an announcer – an auction, sporting event, or rodeo. What you need is someone with a very loud voice – loud ...

  6. Emergency communication system - Wikipedia

    en.wikipedia.org/wiki/Emergency_Communication_System

    WMT Public Address Systems Wireless Mobile Telephony (WMT) PA Systems refers to PA paging and [intercom] systems that use any form of Wireless Mobile Telephony System such as GSM networks instead of a centralized amplifier to distribute the audio signal to paging locations across a building or campus, or other location. The GSM mobile Networks ...

  7. Li-Fi - Wikipedia

    en.wikipedia.org/wiki/Li-Fi

    Li-Fi systems could offer a better system to transmit low latency, high volume data across networks. [citation needed] Besides providing a higher speed, light waves also have reduced effects on medical instruments. An example of this would be the possibility of wireless devices being used in MRIs similar radio sensitive procedures. [44]

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