deaths
Edwin Howard Armstrong, American engineer, invented FM radio (born 1890)
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Edwin Howard Armstrong
American electrical engineer and inventor (1890–1954)
Edwin Howard Armstrong was an American electrical engineer and inventor who developed FM radio and the superheterodyne receiver system.Source: Wikipedia (CC BY-SA)
Frequency modulation
Electronic method of transmitting information with a carrier wave
Frequency modulation (FM) is a signal modulation technique used in electronic communication, originally for transmitting messages with a radio wave. In frequency modulation a carrier wave is varied in its instantaneous frequency in proportion to a property, primarily the…Source: Wikipedia (CC BY-SA)