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Reginald Aubrey Fessenden
st Bolton, Canada,1866 - 22 July 1932
Radio modulation amplitude
AM (AMPLITUDE MODULATION)
Reginald Fessenden tested and found to the amplitude modulation (AM) since 1900 began experiments to transmit the human voice, and only six years after succeeds in experiment by the powerful radio station in Brant Rock in Massachusetts.