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Valdemar Poulsen - Wikipedia, the free encyclopedia
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Valdemar Poulsen, son of a Danish High Court judge was born 23rd November 1869. He was not a good scholar; the only subjects he was interested in were physics and drawing. He had no interest in mathematics, a trait he shared with many other great inventors.
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Poulsen, Valdemar (1869-1942) ... Magnetic recording dates to 1898, when Danish engineer Valdemar Poulsen developed a method for recording sound on a steel wire. He stretched this wire across his laboratory and put the recording apparatus on a trolley that traveled along that wire.
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Questions about poulsen, valdemar
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Contributions to sound recording made by Valdemar Poulsen - inventor of the arc transmitter. ... Valdemar Poulsen (1869-1942) was a Danish electrical engineer and inventor. Poulsen invented the telegraphone for recording telephone conversations and the Poulsen Arc Transmitter.
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Valdemar Poulsen, (b. Nov. 23, 1869, d. July 1942), Danish telephone engineer and inventor, best known for his Telegraphone, which he patented in 1898. It was the first practical apparatus for magnetic sound recording and reproduction.
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Primary force behind the commercial development of Valdemar Poulsen's arc wireless transmission method was Cyril Frank Elwell (1884- 1963), a Stanford student who convinced the inventor to license his patents in the United States to him.
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The Danish inventor and engineer Valdemar Poulsen is largely unknown amongst the general public, yet his invention of the telegraphone - telegrafoon in Danish - has laid the foundation of today's recording industry.
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While working at the Copenhagen Telephone Company, Valdemar Poulsen invented the telegraphone. The device recorded human speech by alternating magnetization of a wire. ... Poulsen patented this first functional magnetic audio recorder in 1898. He became interested in magnetic recording because he was frustrated that...
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Encyclopedia article about Poulsen, Valdemar. Information about Poulsen, Valdemar in the Columbia Encyclopedia, Computer Desktop Encyclopedia, computing dictionary. ... Poulsen, Valdemar (väl`dəmär poul`sən), 1869–1942, Danish electrical engineer. He invented (1898) the telegraphone (an early wire recorder) and the...
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