Edwin Howard Armstrong: A Medium Of Communication

2036 Words 9 Pages
Television and the Internet are, in the 21st century, replacing radio. In fact, advances in technology have allowed people to access an increasing amount of information, through different forms. A person wanting to learn about world news can now go on the Internet, read a newspaper, watch television or listen to the radio. The technology behind radio as well as its inventors is the reason why, nowadays, people have an unlimited access to information; it began in 1844, with the invention of the telegraph and developed from then on to become the most important and powerful medium of communication, through the work of influential people, and most of which, Edwin Howard Armstrong.
Radio is the exchange of sound messages and electromagnetic signals
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By using Marconi and Fessenden’s work, he was able to further the discovery of radio technology. Many of his inventions are still in use today, such as the regeneration circuit, which allows a signal to be amplified several times through the same device, but also the regeneration and amplification of weak radio signals through positive feedback. As Armstrong was a teenager, he became interested in wireless after reading Marconi’s book about sending, wirelessly, the first message across the Ocean; he then decided to build a 125 feet tall antenna mast in his parent’s lawn, in order to further study wireless in all its aspects. As new devices came along, he experimented everything and tried to develop them further. It is with that state of mind that Armstrong, while in junior year at Columbia University’s School of Engineering, welcomed the opportunity to experiment with Lee De Forest’s new Audion tube in 1906. This device was then little understood, even by its creator, and Armstrong set out to ascertain exactly how it worked and how it could be improved. It is in the summer of 1912 that Armstrong discovered that the Audion tube Lee De Forest created could be used not only to detect and amplify signals but also to transmit them. He created a new regenerative circuit, designed to strengthen the incoming signals. When, until then, people needed headphones and quiet rooms to faintly hear the Morse code signals, Armstrong began to hear distant stations loudly, without the use of earphones. This development generated another discovery of his; Armstrong realized that the tube would create rapid oscillations and acted as a transmitter when feedback was pushed to a high frequency. Armstrong had finally understood what De Forest couldn’t as the latter never engaged his newly

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