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Who Use the underwater Bell
Daniel Colloden used an underwater bell to calculate the speed of sound underwater in Lake Geneva, Switzerland. -
The First time someone invented Sonar
Lewis Nixon created the first sonar listening device to detect icebergs. -
The First Submarine Detecting Sonar
Paul Langévin invented the first sonar type device for detecting submarines called an "echo location to detect submarines" using the piezoelectric properties of the quartz. -
The first Sonar devices were passive listening devices
Acoustic communication systems are Sonar devices where there is both a sound wave projector and receiver on both sides of the signal path. -
The Sonar help the German to defend the Battle of the Britain
The use of sonar allowed the powerful British surface fleet to detect the direction and depth of these submarines and destroy many of them. -
U.S.S Pollack sink Japanese freighter
Source This victory was a result of sonar picking up a lone freighter in the water. This is a first of many sinking due to sonar. -
War World II
Sonar was used widely in World War II in an effort to locate enemy submarines.
