Old communication devices on show at IRSTM [Mehr News Agency (Iran)]
(Mehr News Agency (Iran) Via Acquire Media NewsEdge) TEHRAN, Aug. 03 (MNA) – IRSTM (Iran Science and Technology Museum) opens 'Morse to Mobile' hall to showcase old communication devices from first to the most recent ones. In the museum, visitors will be able to hear Mozaffar ad-Din Shah's voice – a king of Qajar dynasty – by old gramophones. Morse code conversation tool, gramophone, radio, telephone and first generations of mobile phones are on show for the visitors in addition to wall banners illustrating and short movies showing communication devices developments through the history. Most of devices on show in the 'Morse to Mobile' hall of the IRSTM are donated by Iranian universities to the museum which have been used through the last two centuries. The visitors are provided to work with the devices in the museum and they can also listen to voices of some figures of old times. A Tehran museum plays back gramophone-recorded voice of Mozaffar ad-Din Shah of Qajar in 'Morse and Mobile' hall available for the visitors to the museum. The first communication device was Morse code conversation tool which was invented by Samuel Morse in 1800. Morse code is a method for transmitting telegraphic information, using standardized sequences of short and long elements to represent the letters, numerals, punctuation and special characters of a message. The short and long elements can be formed by sounds, marks or pulses, and are commonly known as "dots" and "dashes" or "dits" and "dahs". For much of the twentieth century, the majority of high-speed international communication was conducted in Morse code, using telegraph lines, undersea cables, and radio links. However, the variable length of the Morse characters made it hard to adapt to automated links, so for most electronic communication it has been replaced by more regular formats, including the Baudot code and ASCII. Also in late 19th century, Thomas Alva Edison announced his invention of the first phonograph, a device for recording and replaying sound. Early phonographs recorded onto a tinfoil sheet phonograph cylinder using an up-down ("hill-and-dale") motion of the stylus. The Gramophone involved a system of recording using a lateral (back and forth) movement of the stylus as it traced a spiral onto a zinc disc coated with a compound of beeswax in a solution of benzine. Alexander Graham Bell was the inventor of telephone in the 19th century. A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are not in the same vicinity of each other to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user. Radio is the radiation (wireless transmission) of electromagnetic signals through the atmosphere or free space. Guglielmo Marconi was an Italian inventor and electrical engineer, known for his pioneering work on long-distance radio transmission in early 20th century. The first practical demonstrations of television, however, were developed using electromechanical methods to scan, transmit, and reproduce an image. As electronic camera and display tubes were perfected, electromechanical television gave way to all-electronic systems in nearly all applications. Philo Taylor Farnsworth was an American inventor and television pioneer in early 20th century. John Logie Baird was Scottish inventor of the first publicly demonstrated color television system. In the 20th century a revolution happened in communication devices with mobile and internet inventions. A mobile phone (also known as a cellular phone, cell phone, hand phone, or simply a phone) is a phone that can make and receive telephone calls over a radio link while moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile phone operator, allowing access to the public telephone network. By contrast, a cordless telephone is used only within the short range of a single, private base station. Martin Cooper is an American pioneer and visionary in the wireless communications industry. With eleven patents in the field, he is recognized as an innovator in radio spectrum management. Unlike technologies such as the light bulb or the telephone, the Internet has no single "inventor." Instead, it has evolved over time. The Internet got its start in the United States more than 50 years ago as a government weapon in the Cold War. For years, scientists and researchers used it to communicate and share data with one another. Today, we use the Internet for almost everything, and for many people it would be impossible to imagine life without it. ZK MNA END
(c) 2014 Mehr News Agency Provided by SyndiGate Media Inc. (Syndigate.info).
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