Chapter 7-Radio Flashcards
(35 cards)
Who was competing over who invented the radio
Nikola Tesla and Guglielmo Marconi
Who is the Father of Radio
Marconi , first to send signals/ telegraph code through the air up to two miles
Who was interested in Marconi’s idea
Great Britain, not Italy
Reginald Fessenden
Canadian who invented the liquid barretter
liquid barretter
the first audio permitting the reception of wireless voice transmissions
First public broadcast of voices and music
Christmas Eve broadcast from Brant Rock (small village) done by Reginald Fessenden
American Lee DeForest
invented the audion tube
audion tube
a vacuum tube that improved and amplified wireless signals, music became a reality
DeForest saw radio as a
means of broadcasting
After WWI
US govn. ordered closing of all stations of radio
Edouard-Leon Scott de Martinville
recorded a folk song on a phonautograph
Edison patented
his “talking machine”
“talking machine”
Edison’s device for replicating sound that used a hand-cranked grooved cylinder and a needle, but only ONE recording could be made of a given sound
Emile Berliner
German immigrant, solved Edison’s problem, created a reasonably priced record player
Who created two sided discs
Columbia Phonograph Company in 1905
Joseph P. Maxwell
developed the electromagnetic recording in 1924 at Bell Laboratory
broadcasting definition
transmitting voices and music at greater distances to a large number of people
Alexander Graham Bell’s telephone company
delivered music to homes and businesses by telephone wires
David Sarnoff
employee of Marconi, wrote the “Radio Music Box Memo”
The Radio Corporation of America (RCA)
American Marconi, General Electric, American Telephone and Telegraph, and Westinghouse all joined together to create this government sanctioned monopoly that avoided direct government control of the radio medium
RCA’s commercial manager
David Sarnoff
KDKA
made the first commercial radio broadcast
The RCA agreements showed what
that the government had an interest on the development and operation of radio
Wireless Ship Act
required that all ships using US ports and carrying more than 50 passengers have a working wireless and operator