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telegraphone
device
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magnetic recording
- In magnetic recording
…introduced a machine called the telegraphone that recorded speech magnetically on steel wire.
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Poulsen’s invention
- In Valdemar Poulsen
…working there, he invented the telegraphone, an electromagnetic phonograph capable of registering human speech by the alternating magnetization of a wire. He applied for a patent on this device, a forerunner of the modern magnetic sound recorder, in 1898. A working model created great interest at the Paris Exposition in…
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