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  2. Varizone - Wikipedia

    en.wikipedia.org/wiki/Varizone

    Varizone is a fully digital public address system technology developed and produced and by Klotz Digital.. In contrast to traditional public address systems using analogue 70 or 100 volt speaker systems Varizone is a fully digital system that transmits the audio digitally to the speaker, where it is amplified by small, distributed programmable amplifier modules.

  3. Public address system - Wikipedia

    en.wikipedia.org/wiki/Public_address_system

    A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.

  4. Microphone - Wikipedia

    en.wikipedia.org/wiki/Microphone

    The MEMS (microelectromechanical systems) microphone is also called a microphone chip or silicon microphone. A pressure-sensitive diaphragm is etched directly into a silicon wafer by MEMS processing techniques and is usually accompanied with an integrated preamplifier. [35] Most MEMS microphones are variants of the condenser microphone design.

  5. Cordless telephone - Wikipedia

    en.wikipedia.org/wiki/Cordless_telephone

    Two cordless telephones 3 VTech cordless landline phones A Panasonic KX-TG2226B 2.4GHz cordless phone with answering machine. A cordless telephone or portable telephone has a portable telephone handset that connects by radio to a base station connected to the public telephone network. The operational range is limited, usually to the same ...

  6. Tannoy - Wikipedia

    en.wikipedia.org/wiki/Tannoy

    Actor Cyril Ritchard and three young women listen to the Tannoy public address system in 1948. Professional studio monitor Little Gold Monitor (c. 1990) with two-way-coaxial construction, meaning the tweeter for frequencies from 1.400 Hz and above is located independently in the center of the 30 cm bass driver.

  7. Sound system - Wikipedia

    en.wikipedia.org/wiki/Sound_system

    Sound system (DJ), a group of disc jockeys performing together; Sound system (Jamaican), a group of disc jockeys, engineers and MCs playing ska, rocksteady or reggae music; Sound System Records, an Australian record label; LCD Soundsystem, an American rock band; Sound System, by The Clash; Sound System: The Final Releases, a 2021 EP by Bad Gyal

  8. Loudspeaker - Wikipedia

    en.wikipedia.org/wiki/Loudspeaker

    The term loudspeaker may refer to individual transducers (also known as drivers) or to complete speaker systems consisting of an enclosure and one or more drivers.. To adequately and accurately reproduce a wide range of frequencies with even coverage, most loudspeaker systems employ more than one driver, particularly for higher sound pressure level (SPL) or maximum accuracy.

  9. Emergency communication system - Wikipedia

    en.wikipedia.org/wiki/Emergency_Communication_System

    Audio Public Address Systems Audio public address speakers A system which can provide audio (usually spoken language) messaging capability, usually consisting of microphone devices, wiring, and speakers installed in public areas of buildings. These systems are typically located indoors or in smaller outdoor areas with multiple speakers, due to ...

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