True or False, an amplifier amplifies sound.
True
True or False, The Transistor is bigger than the Triode Vacuum Tube.
False
What is the main material used in an electret microphone?
An Electret
What year was the Ribbon Speaker/Microphone invented?
1924
What year was the Dynamic Loudspeaker invented?
1924
What year was the first amplifier invented?
1906
What year was the Transistor invented?
1947
What years was the electret microphone being invented?
1962-64
How many inventors did the Ribbon Speaker and Ribbon Microphone have?
2
How many people invented the Dynamic Loudspeaker?
2
The first amplifier was invented by whom?
Dr. Lee De Forest
What group invented the Transistor?
Bell Laboratories
Who invented the Electret Microphone?
James West
What is the main material used in the Ribbon mic and speaker.
Aluminum Ribbon
Who invented the Dynamic Loudspeaker?
Kellogg and Rice
What was the name of the first amplifier?
Triode Vacuum Tube
The Transistor was able to ___________ and ___________ the movement of electrons.
Increase and Decrease
What kind of charge does an electret have?
A permanent charge
The Aluminum Ribbon helps convert sound waves into _______________.
Electrical Signal
The Dynamic Loudspeaker was mainly used to project sound where?
Movie theaters
How did the first amplifier adjust the volume of sound?
Controlling the movement of electrons
True or False, The Transistor requires MORE energy to function.
False
What is an example of an insulating material that an electret is made of?
Wax, Rosin
Who invented the Ribbon Mic and Speaker?
Walter H. Schottky and Dr. Erwin Gerlach
DAILY DOUBLE!!!!
What 2 materials were used in the Dynamic Loudspeaker
Metal coil and a magnet