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1490
First experiment, in 1490.
In 1490 Leonardo da vinci used a tube in the water to detect ships, putting one of his ears in one part of the tube. -
First time calculating speed of sound in water.
Jean-Daniel Colladon and Jacques Charles François Sturm (Both were scientists, mathematician and physicist) made an experiment, Sturm puts a underwater bell in a lake and Colladon was in a known distance from the bell with a chronometer, Sturm made the bell sounds and Colladon recorded the time that the sound tooks to cross the lake. They thought that the speed of sound in water was 1434 mts/sec, nowadays we know that the speed is from 1400 to 1600 mts/sec. -
The invention of sonar.
Lewis Nixon invented the fist sonar for detect icebergs.
https://www.thoughtco.com/the-history-of-sonar-1992436 -
Sonar device
In 1912 the physicist Robert William Boyle was recruited to create a sonar device to beat other countries. -
Sonar in the world war one.
When the world war one started, the sonar was used to detect enemy submarines, but the invention for war comes after. -
The sonar for battle was created.
During world war one the physicist Paul Langevin invented the first sonar to detect enemies submarines, a very important invention in world wars. -
The first time that sonar was used in war.
In 1918, the sonar that Paul Langevin invented the past year was used for first time in war. The echoes were received from a submarine at distances as 1500m. -
USA and Great Britain establish sonar systems
The EE.UU and Great Britain created the first sonars to send out signals to detect enemy submarines.https://www.youtube.com/watch?v=sMe7TovEneA -
Medical Sonar
It is used to create an image of internal body structures such as muscles, joints, tendons, blood vessels, and internal organs.
https://youtu.be/I1Bdp2tMFsY -
Medical ultrasounds
is a diagnostic imaging technique based on the application of ultrasound. It is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs. https://en.wikipedia.org/wiki/Medical_ultrasound -
The sonar in world war 2
In 1939 the sonar was being used again by the USA for the fight with Germany. -
The sonar in a defeat
In 1940, the sonar was very helpful for the defeat of Germany, in the battle of Britain. -
New model sonar 147
The advances of the investigation of the sonar led to news serie of sonar´s which were separate issuance of reception. http://inventors.about.com/library/inventors/blsonar.htm
