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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.
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.
A butler uses an intercom on behalf of a lady. An intercom, also called an intercommunication device, intercommunicator, or interphone, is a stand-alone voice communications system for use within a building, small collection of buildings or portably within a small coverage area, which functions independently of the public telephone network. [1]
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 ...
These systems, however, gave a very poor sound quality. David Edward Hughes invented a carbon microphone in the 1870s. The first microphone that enabled proper voice telephony was the (loose-contact) carbon microphone. This was independently developed by David Edward Hughes in England and Emile Berliner and Thomas Edison in the US. Although ...
Japan's Personal Handyphone System, another system based upon microcells, is a direct analog of CT2 and has achieved a much greater level of success. PHS is a full microcellular system with hand-off, better range, and more features. The DECT system is CT2's successor, and also supports full microcellular service and data. However, to date DECT ...
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TOA Corporation (TOA株式会社, Tī Ō Ē Kabushiki-gaisha) is a Japanese electronics company, specializing in public address systems, intercom systems, microphones, array speakers and megaphones. [3]
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