biography
| name: |
Armstrong, Edwin H(oward)
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| sex:
| male
|
| lived:
| (1890–1954)
|
| biography:
| Electrical engineer and inventor, born in New York City, USA. He studied at Columbia University, and during World War 1 became interested in methods of detecting aircraft. In the course of his research he devised the superheterodyne radio receiver, and by 1939, as professor at Columbia University (1935–54), he had perfected the frequency-modulation system of radio transmission which virtually eliminated the problem of interference from static. |
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