# data[].attributes.body
Electronic device for communication, which receives and propagates radio signals. It was the first mass communication platform.

# data[].attributes.body
-Amplitude Modulation
- Mid 1870s.
-  Poorer sound quality.
-  Transmitted over long distances.
- Frequency and phase remain the same.

# data[].attributes.body
"There will be new products in the next months", explained LIne Langnes of the Norwegian Media Authority earlier this year. "You will have touch screens and it will be possible to read to texts on the display".

# data[].attributes.body
Digital audio broadcasting (DAB), also known as digital radio and high-definition radio, is audio broadcasting in which analog audio is converted into a digital signal and transmitted on an assigned channel in the AM or (more usually) FM frequency range.
- search mobile computing

# data[].attributes.body
- Frequency Modulation.
- Developed in 1930.
-  Better sound quality.
- Signals are impacted by physical barriers.
- Amplitude and phase remain the same.

# data[].attributes.headline
  THE FUNCTION OF RADIO ON THE FIRST WORLD WAR     

# data[].attributes.subject
  THE FUNCTION OF RADIO ON THE FIRST WORLD WAR     

# data[].attributes.body
During the first world war, radio was an important source of communication between the nations, with the function of transmitting information to the population about the events of the war. Radio wave transmitters and antennas became the main target in this period, in order to avoid warning among local civilian attackers.

# data[].attributes.body
- The Italian Guglielmo Marconi is seen as the inventor of radio, but it does only exist because of previous discoveries.
-It combines three technologies: cordless telephone, telegraphy and transmission waves.
-Radio waves were discovered in 1860 by the Scottish physicist James Maxwell, but these were only developed in 1886 by Heinrich Hertz. He showed the rapid variation of electrical current in the form of radio waves in space. So Marconi defined radio signals on a phone line and called it a wireless telegraph.
-The first radio broadcast took place in Dublin during a sporting event, but it only transmitted signals and not the voice. In 1901, Marconi received the Nobel Prize in Physics.
-There was a legal dispute between Nikola Tesla and Marconi in which Tesla claimed the patent for the radio.
-The voice transmission took place in 1921. The first transmission that united voice and music was in 1906 in Massachusetts in the United States.
-The First World War was an important factor to spread the radio and many stations were opened, reaching 550 stations in 1922. The radio only became popular after 1927, as there was a lot of difficulty in tuning in stations.

# data[].attributes.body
It had its importance in politics, with the implementation of mandatory electoral advertisements, at the time those of Getulio Vargas are the most successful. And the 'voice of Brazil', which continues to this day.

# data[].attributes.body
The podcast is a streaming media that resembles a radio program. The difference is that the podcast is not instantaneous as the radio and requires a more time-consuming preparation.
But both are audio media that have several genres, such as humorous, informative, sporting, among others.

# data[].attributes.body
in Brazil, the first official radiophonic transmission occurred on September 7, 1922 during the speech of President Epitácio Pessoa.
The first radio was the Radio Society of Rio de Janeiro, which is still in the air, but is now called "Radio Mec". Before he presented opera and cultural programs, it was inaccessible.