Echo sounding is the technique of using sound pulses directed from the surface or from a submarine vertically down to measure the distance to the bottom by means of sound waves. History After the disaster of the Titanic in 1912, the German physicist Alexander Behm conducted some research to find a way to detect icebergs. He discovered the technique of echo sounding which turned out to be inefficient in spotting icebergs, but a great tool to measure the depth of the sea. Behm had his invention pa… (More on Echo-sounding)