Recent Event Highlights: GPS in Cars, FM radios in cars, Radio listeners exceeds newspapers printed, FM radio is invented, Directional Radio Antennae, First radio antennae, and 23 more...
Created by dwarika on Sep 17, 2009
Last updated: 09/24/09 at 11:38 AM
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One of the things that really innovated internet radio was Skype. It allowed people around the world to web chat or talk for free.
Around 2004 GPS's became very popular in automobiles.
A GPS is fully operational by 1995 and is started to be used in more fields of science.
"The U.S. Army and DARPA launched an aggressive successful project to construct a software radio that could become a different radio on the fly by changing software."
Internet radio was created which made it easier to listen to radio from anywhere in the world.
The GPS constellation of satellites were launched. A GPS uses radio signals to determine locations
Even though FM started to gain pouplarity in the 60s, it wasn't until 1978 where there were more FM listeners than AM listeners.
LORAN (LOng RAnge Navigation) was invented as a "premier navigation system". It used low frequency radio transmitters to find the location of a signal.
Many car companies started to make FM compatible radios in cars.
The United States radio stations starts broadcasting stereophonic sound, which is sound recorded simultaneously through two or more electronic channels
"The USA long-distance telephone network began to convert to a digital network, employing digital radios for many of its links"
Sony, a Japanese Company, create the first transistor radio which was pocket sized which made it more convenient. Japan was known for its cheap products but this new product changed their reputation for the better
The number of radio listeners in the world exceeds the number of newspapers printed daily.
After World War II, FM radio was introduced to Germany.
During the 1940s, the radio was used more as a lifeline than anything else. With World War II, people had to go through many changes. Women started working, many men were sent to war and everything from clothes to food was rationed.
"Radio was used in World War II to entertain troops, keep the home front informed, and raise money for the war."
At age 43, Edward Howard Armstrong created the invention of wideband FM radio. Although his invention made him happy, he was stressed by the fact that other people were claiming ownership of the invention.
During the 1930s instead of entertainment, people listened to the radio to listen to the news to relieve themselves of the stress that the Great Depression brought.
While creating the television, many people like philo Farnsworth used the radio to ransmit pictures and sound onto the television.
The vacuum tube was created, it amplified the signal of the radio by controlling the movement of electrons in a low-pressure space.
KDKA became the first broadcasting radio station in America. It originated in Pittsburg, PA
The popularity of the radio in th 1920s spread like wildfire, everyone wanted a radio. They even sold radio making kits which were very popular among young boys. By 1922 there were already 600 radio stations. They braodcasted things like "popular music, classical music, sporting events, lectures, fictional stories, newscasts, weather reports, market updates, and political commentary."
Radio communications had become popular after it is used to alert someone of an escaping criminal.
"GE develops a 100 kHz, 2 kW alternator for radio communication"
"Fessenden invents a high-frequency electric generator that produces radio waves with a frequency of 100 kHz"
R.A. Fessenden helps to broadcast the first radio program with voice and music from Massachusetts. Fessenden also played the violin and read bible stories on the broadcast.
In, 1905 Marconi patented his directional radio antennae.
Marconi creates the first directional radio antennae.
Reginald Aubrey Fessenden (an American scientist) first transmits audio via airwaves, The signal was received from over a mile away
Marconi establishes first radio link between England and France
The death of Heinrich Hertz inspired Marconi to start experimenting with radio waves.
Heinrich Hertz was the first to produce radiowaves using his own inventions, the Hertz antenna and Dipole antenna.
Hertz (Hz) a unit of frequency, was named in his honor.