“EMPIRE OF THE AIR: THE MEN WHO MADE RADIO”
REVIEW QUIZ
Match the definitions with the correct terms listed below:
1.
The name Lee de Forest gave to his greatest invention, the radio tube. Resembling a light bulb, this invention could detect radio waves, and regulate their flow.
2.
Invented by Howard Armstrong, this device fed the radio waves back through the
Audion tube as many as 20,000 times a second, each time increasing its strength. The device made it possible for people to put aside their earphones and listen to the sounds of radio through a speaker. When he fed the radio waves back through the
Audion tube more than 20,000 times a second, Armstrong found that the tube began to produce its own signal, enabling it to become a transmitter. Armstrong's invention is the heart of every radio transmitter today.
3.
An invention of Howard Armstrong, this device enabled radios to tune in signals of very high frequency. It is the basis of the tuner and channel selector found in every radio and television today.
4.
The name given to radio waves whose height and depth undulate in accordance with the fluctuations of the sound signal. It was the first method of radio broadcasting, and is still used today.
5.
The inventor of the "regeneration" and "superheterodyne" circuits as well as
"frequency modulation," or FM. A flamboyant man with a fondness for fast cars and a passion for great heights, he was proclaimed a genius whose inventions had made modern radio possible. But others, including Lee de Forest, disputed his patents. He spent much of his life in court, embroiled in lawsuits.
6.
The name given to radio waves whose frequency changes in accordance with the fluctuations of the sound signal. Howard Armstrong invented this broadcasting system in 1933.

7.
The inventor of the "Audion" tube, who liked to call himself the "Father of Radio."
He grew up in Talladega, Alabama, where his father was the white president of a college for recently freed slaves. Though he held more than three hundred patents, his detractors claimed that most of his "inventions" had already been discovered by others.
8.
The hard-driving immigrant from Russia who created the "Radio Music Box." As an office and delivery boy for the Marconi Company he impressed all who met him, including Marconi himself. With the inventor's help he rose to become president of the most powerful communications company on earth -- and he let nothing and no one stand in his way.
9.
The Italian-born inventor of "Wireless" telegraphy. In 1896 he took out a patent on his unique system to transmit the dots and dashes of telegraph messages through the air, and in 1899 introduced the Marconi Wireless Telegraph Company in America.
Soon wireless messages were being sent between ships at sea and wireless stations on the East Coast.
David Sarnoff (1891-1971)
Audion
Frequency Modulation/FM
Guglielmo Marconi (1874-1937)
Regeneration Circuit
Lee de Forest (1873-1961)
Superheterodyne Circuit
Amplitude Modulation/AM
Edwin Howard Armstrong (1890-1954)