18 jan 1933 ano - FM radio is patented by Edwin Armstrong

Descrição:

Frequency Modulated Radio has a wider range of transmittable sound with less static, and more efficient. He is ignored by RCA for the rest of his life. Not really used until the 50s. By 1950 95% of urban households had at least one radio. Panic caused by War of the Worlds. In ‘51 television makes its debut, stealing radio’s audience by ‘54

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