Valdemar Poulsen Summary

Everything you need to understand or teach Valdemar Poulsen.

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  • 1 Encyclopedia Article
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Study Pack

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Encyclopedia Articles (1)

105 words, approx. 1 pages
Valdemar Poulsen 1869-1942 Danish engineer who invented the telegraphone, the first practical device for recording and replaying sound—the forerunner of modern audio and video recording systems... Read more