Broadcasting has a long history; one that goes beyond Tesla, Marconi and Armstrong, and includes advances in communication and technology, according to Radio magazine. Some of the important dates from radio’s past are covered on the AmericanRadioHistory.com website. There you can read about the first forms of radiotelegraphy systems.
In fact, the early 1920s marks an important date in the time of radiotelegraphy communication: at that time, it provided the basis for public radio network broadcasting and even early television programming: scientists were experimenting in 1925 with televisions, to include video content broadcast via radio. broadcasts on designated channels to a dispersed audience.
The initial audio broadcast launched the AM broadcast on a radio station. To overcome the interference problems of AM radio, stations began using FM radio in the 1930s, as its band provided clearer audio sound through the air as radio waves from a transmitter to an antenna. . It wasn’t until the 2000s that Americans were introduced to digital radio and direct broadcast satellite (DBS).
In the 1930s, radio and television broadcasting (television broadcasting) was an integral part of the American way of life.
In the previous decade, the 1920s, the first radio amateurs transmitted information in the form of Morse code; a series of on and off tones provided communication on telegraph lines, submarine cables, and radio circuits to transmit emergency signals. Radiotelegraphy using Morse code proved vital during World War II. Mayday calls were also made over the radio to signal a life-threatening emergency. A fire, explosion, or sinking of a vessel or aircraft, where announced by a signal broadcast three times in a row (“Mayday Mayday Mayday”); the distress call was broadcast for help in times of emergency.
A device called a radio amateur was used early on for amateur radio broadcasting; a range of frequencies (reserved for business, police and government use only) allowed for one-way and two-way communication in the 1940s. Amateur radio became something of an emergency broadcast system for getting the word out to the community at large in case of an emergency, such as a natural disaster. The SOS (amateur distress call) sent by the Titanic had apparently used a radio amateur in April 1912, the ARRL (American Radio Relay League), the national association of radio amateurs, noted on its “Ham Radio History” webpage. .
In the 1950s, CONELRAD (Control of Electromagnetic Radiation) was a method of emergency broadcast to the public; the CONELRAD system (used during the Cold War) was replaced by the Emergency Broadcast System (EBS) in the 1960s, which was later replaced by the Emergency Alert System (EAS) in the 1990s. Regardless of the change in name, each served as a national alert system to the American public in the event of war or major national crisis, as well as local weather emergencies. Such broadcast systems played a vital role in emergencies to quickly provide the necessary alert and message to a community when a disaster situation arose. In essence, it announced an emergency broadcast response that could save human lives and give instructions if an evacuation was required.
To this day, radio broadcasting has been the most widely used medium for distributing civil emergency messages to the public.
Throughout history, it has been widely accepted as the mass media for information, especially in times of severe weather and even war-related threats. In fact, radio communication can be maintained even when other means of communication fail and there is no power. In addition, it is a medium to which everyone has access. The transmission of real-time warnings to citizens in case of emergency demonstrates that communication devices such as radios can still be of great importance in emergency situations today, even in the age of computers and mobile devices. .