Radio broadcasting has a long history; beyond Tesla, Marconi and Armstrong, it includes advances in communications and technology, as explained by Radio magazine. The American RadioHistory.com website introduces some important dates of the past. There, people can read about the earliest forms of radiotelegraph systems.
In fact, the early 1920s marked an important date for radiocommunication communications: at that time, it provided the basis for public radio network broadcasting and even early television programming: scientists experimented with television in 1925, including the distribution of video content distributed via radio. The channel is transmitted to the distributed viewer.
Early audio transmissions are set in the AM broadcast on the radio station. In order to overcome the interference problem of AM radio, the radio began to use FM radio in the 1930s because its frequency band provides clearer audio sound through the air as a radio wave from the transmitter to the antenna. Until the 2000s, American talent was introduced into digital broadcasting and satellite live broadcasting [DBS].
By the 1930s, radio and television broadcasting [television broadcasting] was an integral part of the American way of life.
In the past decade, in the 1920s, early amateur radios transmitted information in the form of Morse code; a series of switching tones provided telegraph lines, communications on submarine cables and radio circuits for transmitting emergency signals. Radiograms using Morse code proved to be crucial during the Second World War. In addition, the Mayday call was sent over the air, indicating a life-threatening emergency. A fire, explosion or sunken ship or aircraft is declared to send signals three times in a row ["Mayday May Day, May Day"]; in case of emergency, a call for help is sent for help.
Devices known as ham radios were used early in amateur radio; a range of frequencies [for commercial, police and government use only] allowed for one-way and two-way communication in the 1940s. The ham radio happens to be an emergency broadcast system that can be advertised to the wider community in emergencies, such as natural disasters. In April 1912, the SOS [Amateur Distress Call] sent by Titanic used radio ham, ARRL [American Radio Relay Alliance], National Amateur Radio Union, on its "Ham Radio History" page.
In the 1950s, CONELRAD [Electromagnetic Radiation Control] was a method of emergency broadcasting to the public; the CONELRAD system [used during the Cold War] was replaced by the Emergency Broadcasting System [EBS] in the 1960s and later in the 1990s. System [EAS] replaced. Regardless of the name change, in addition to local weather, everyone provides a national early warning system to the American public during war or serious national crises. Such broadcast systems play a vital role in emergencies to quickly provide the community with the necessary alerts and information in the event of a catastrophic situation. In essence, it announced an emergency broadcast response that could save lives and provide instructions if evacuation is required.
To this day, radio broadcasting has been the most commonly used medium for distributing public civil emergency information.
Historically, it has been widely accepted as a mass media for information, especially in times of bad weather and even war-related threats. In fact, radio communication can be maintained even if other communication methods fail and there is no power. In addition, it is the media that everyone can access. Sending real-time warnings to citizens in the event of an emergency, even in the era of computers and mobile devices, communications devices such as radio are still important in emergencies.
Orignal From: The important role of radio stations in emergencies
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