AM broadcasting

AM radio is radio broadcasting using amplitude modulation. It was the dominant method of broadcasting during the first two thirds of the 20th century and remains widely used into the 21st.

Related Topics:
Radio broadcasting - '''a'''mplitude '''m'''odulation - 20th century - 21st

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Because of its susceptibility to atmospheric interference and generally lower-fidelity sound, AM broadcasting is better suited to talk radio and news programming, while music radio and public radio mostly shifted to FM broadcasting in the late 1960s and 1970s.

Related Topics:
Talk radio - News - Music radio - Public radio - FM broadcasting - 1960s - 1970s

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AM radio technology is simpler than either FM radio or DAB. An AM receiver detects amplitude variations in the radio wave. It then amplifies changes in the signal voltage to drive a loudspeaker or earphones. The earliest crystal radio receivers used a crystal diode detector with no amplification.

Related Topics:
DAB - Radio wave - Voltage - Loudspeaker - Earphone - Crystal radio receiver - Diode

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