comm101_winter08_week10notes - Campbell Chapter 4 Early...

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Comm 101: Winter 2008 Sections: 005, 006, 007 Erica Denise Williams, GSI Week 10 Notes Campbell: Chapter 4 Early Technology and the Development of Broadcasting The wired and electronic transmissions of media messages have always required power,  symbols, and a transmission-reception system. A.  Inventions Leading to the Modern Age of Mass Media.  The invention of the  telegraph in the 1840s ushered in the modern age of mass media. Heinrich Hertz  made a profound breakthrough by proving that electricity emitted electromagnetic  waves. 1. Marconi Invents Wireless Telegraphy. In 1894, Guglielmo Marconi  developed wireless telegraphy, a form of voiceless point-to-point  communication. 2. De Forest Invents Wireless Telephony. Lee De Forest aimed to go  beyond Marconi and began transmitting voices and music with his  wireless telephony system. By 1902, radio transmission had evolved from  narrowcasting into broadcasting. B.  Regulating a New Medium.  Congress passed the Radio Act of 1912 in response  to increased noise and interference on the airwaves. C.  The Deals That Made Radio an American Medium.  With World War I  beginning in Europe, the American navy urged GE to buy American Marconi, a foreign- controlled company. GE then formed the Radio Corporation of America (RCA),  which became the chosen instrument of American communication technology  throughout the world. The Evolution of Commercial Radio A Westinghouse engineer’s radio experiments in a Pittsburgh garage evolved into  KDKA, the first professional radio station, in 1920. A.  The RCA Partnership Unravels form the first radio network with its telephone lines. B. 
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This note was uploaded on 04/03/2008 for the course COMM 101 taught by Professor Jacobs during the Winter '07 term at University of Michigan.

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comm101_winter08_week10notes - Campbell Chapter 4 Early...

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