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Polygraph Test
John Larson came up with the concept for a device that detected spikes in blood pressure, respiratory, and pulse rates when a person was undergoing questioning. He was working part time for the police department and earning his Ph.D. in physiology when he invented the lie detector test. It was helpful in busting criminals but is now deemed as not entirely accurate because some have the ability to "cheat" the test. -
Wired Radio
George Squier figured out how to transmit music over wires and how to make telephone lines carry multiple signals at once. He was an intellectual war veteran that paved the way for many technological advances, even laying down the early foundation for the concept of the internet. -
2-A Audiometer
Dr. Harvey Fletcher was an American physicist and is credited with the invention of the 2-A audiometer, which is used to evaluate hearing loss. He's dubbed the "father of stereophonic sound" and made contributions in electrical engineering and speech. -
Radio Altimeter
Lloyd Espenschied was an American Engineer that patented his collision avoidance system that uses reflected radio waves to determine the distance between aircrafts and the ground below. -
Electronic Television System
Philo Taylor Farnsworth was an American television pioneer credited with crucial contributions to the early development of an all electronic, fully functional, television system.