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- Paul Langevin, a French physicist, invented the first system designed to utilize sound waves and acoustical echoes in an underwater detection device, based on the physics of sound transmission articulated by Lord Rayleigh and the piezoelectric effect discovered by Pierre Curie1. Robert H. Rines contributed to radar and sonar at the Massachusetts Institute of Technology's Radiation Laboratory with modulation techniques for the Microwave Early Warning System developed secretly during World War II2. Frederick Hunt coined the term SONAR for the American underwater sound-detection technology3. Watson-Watt invented RADAR by combining direction and range finding techniques4.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Based upon the physics of sound transmission articulated by nineteenth-century English physicist Lord Rayleigh (1842-1914) and the piezoelectric effect discovered by French scientist Pierre Curie (1509-1906) in 1915, French physicist Paul Langevin (1872-1946) invented the first system designed to utilize sound waves and acoustical echoes in an underwater detection device.www.encyclopedia.com/science/encyclopedias-alm…Robert H. Rines' contributions to radar and sonar began at the Massachusetts Institute of Technology's Radiation Laboratory with modulation techniques for the Microwave Early Warning System developed secretly during World War II.www.invent.org/inductees/robert-rinesDuring the 1930s American engineers developed their own underwater sound-detection technology, and important discoveries were made, such as the existence of thermoclines and their effects on sound waves. Americans began to use the term SONAR for their systems, coined by Frederick Hunt to be the equivalent of RADAR.en.wikipedia.org/wiki/SonarIn 1935, Watson-Watt had the ingenious idea of combining these direction and range finding techniques and, in so doing, he invented RADAR.teacherscollegesj.org/who-invented-the-sonar-radar/
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NIHF Inductee Robert Rines Invented High-Resolution Radar and …
Nov 1, 2009 · Robert H. Rines' contributions to radar and sonar began at the Massachusetts Institute of Technology's Radiation Laboratory with modulation techniques for the Microwave …
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See results only from invent.orgHedy Lamarr
Actress Hedy Lamarr was best known for her work in Hollywood during its Golden Age, starri…
History of radar - Wikipedia
The history of radar (where radar stands for radio detection and ranging) started with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell's seminal work on electromagnetism. However, it was not until the early 20th century that systems able to use these principles were bec…
Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 4 mins
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The Development of RADAR and SONAR | Encyclopedia.com
- Although they rely on two fundamentally different types of wave transmission, Radio Detection And Ranging (RADAR) and Sound Navigation and Ranging (SONAR) both are remote sensing systems with important military, scientific, and commercial applications. RADAR sends out electromagnetic waves, while active SONAR transmits acoustic (i.e., sound) waves....
Sonar - Wikipedia
Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels.
"Sonar" can refer to one of two types of technology: passive sonar means liste…Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 10 mins
Who Invented Sonar? - ThoughtCo
Lewis Nixon invented the very first Sonar type listening device in 1906 as a way of detecting icebergs. Interest in Sonar increased during World War I when there was a need to be able to …
RADAR and Doppler RADAR Invention and History - The Inventors
Doppler RADAR is named after Christian Andreas Doppler. Doppler was an Austrian physicist who first described in 1842, how the observed frequency of light and sound waves was …
Hedy Lamarr: Not just a pretty face | Scientific American
Jun 3, 2008 · Hedy Lamarr wasn't just a beautiful movie star. According to a new play, Frequency Hopping, she was also a shrewd inventor who devised a signal technology that millions of …
Hedy Lamarr │ The National Inventors Hall of Fame
Jan 19, 2000 · Actress Hedy Lamarr was best known for her work in Hollywood during its Golden Age, starring in films such as "Ziegfeld Girl" and "Samson and Delilah". But Lamarr also …
Radar and Sonar - NHHC
Nov 30, 2023 · Leo C. Young and Dr. Alfred Hoyt Taylor made the first U.S. observations of the radio reflection phenomenon. Eight years after the initial discovery, scientists noted that the...
RADAR and SONAR - Encyclopedia.com
In 1935, Watson-Watt had the ingenious idea of combining these direction and range finding techniques and, in so doing, he invented RADAR. Watson-Watt built his first practical RADAR …
Your Engineering Heritage: Early History of Sonar
May 1, 2014 · In 1942, F.V. Hunt, the director of Harvard’s wartime Underwater Sound Laboratory created the word “sonar.” By 1943, the U.S. Navy adopted the word “sonar” (Sound Navigation …
Hedy Lamarr - National Women's History Museum
Hedy Lamarr was an Austrian-American actress and inventor who pioneered the technology that would one day form the basis for today’s WiFi, GPS, and Bluetooth communication systems.
Sonar, Secret Weapon of the Sea | Proceedings - April 1947 Vol.
Radar, a relatively well publicized development, gives eyes to the fleet; sonar contributes cars and a voice underwater. The Navy’s story of research and development in Subsurface Warfare, for …
Hedy Lamarr | Actor and second world war inventor - New Scientist
Jan 19, 2000 · Lamarr and Antheil patented their invention in 1942, but it was classified until 1981, and during that time only used in military technology such as sonar or satellite communications.
Reginald Fessenden and the Invention of Sonar
May 19, 2020 · In 1910, still unwilling to compromise with his business partners, Fessenden was fired. Inventor and radio pioneer Reginald Fessenden (seated) with his son (holding cat) and …
World War II: 1941-1945 - Discovery of Sound in the Sea
The effort focused on making careful measurements of factors that affected the performance of echo ranging systems, which came to be called “ sonars ” late in WWII as an acronym for …
Hedy Lamarr: From Hollywood glamour to frequency-hopping, a …
Sep 1, 2021 · Lamarr and Antheil's idea was revisited in the 1950s, with an electronic version of frequency hopping developed for a sonobuoy, a device dropped from an airplane to detect …
Hedy Lamarr - Wikipedia
At the beginning of World War II, along with George Antheil, Lamarr co-invented a radio guidance system for Allied torpedoes that used spread spectrum and frequency hopping technology to …
When Was Sonar First Used? - Techhistorian
Although the concept of sonar was theorized as early as 1822, sonar would not be converted into active, usable technology until 1916, when Canadian physicist Robert William Boyle produced …
SUBMARINE BELLS TO SONAR & RADAR SUBMARINE …
A 1946 book “Radar’161 in the chapter titled “Who Invented Radar?” lists some American companies active in radar research and development during WWII. The list includes …
IET Radar, Sonar & Navigation
Oct 19, 2024 · 1 INTRODUCTION. Chaff has been widely used to passively counter the detection and tracking capabilities of radar systems since War World II. Chaff consists of single highly …
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