Hedy Lamarr
Hedy Lamar was an American film actress and inventor, known as one of the best movie actresses of all time.
Hedy Lamarr was an actress. She did not have an educational background, and had not graduated from college; she was primarily self taught. However, she liked to work on different inventions in her spare time, including a tablet that could be dissolved into water to create a carbonated drink. When World War II occurred, she realized that the guidance system that torpedos used could be jammed by enemies. Therefore, she decided to create a mechanism that could create a signal, so that it could prevent this from happening. She worked with a composer named George Antheil to achieve this, by creating a mini piano contraption that contained radio signals. This contraption could make the radio guidance transmitter and the torpedo's receiver of the signals move together throughout different frequencies, preventing interference. This is called "frequency hopping." Lamarr's concept was also used to create sonobuoys, which detect submarines when dropped into a body of water. This "spread spectrum" technology that Lamarr created helped form what is known as Wifi today, and without her, it would not have been possible.