The majority the experiments carried out Edison
were submarine location. Edison was stranger the science of
sound and concentrated tracking the noise submarines
by amplifying the sound waves they came through the water.
He tried telephone amplifiers, audions, resonators, and other
devices pick and amplify the sound the submarine's
screws. also
energized the NCB into action. Ships used hydrophones detect the sound submarine
engines and screws. Edison typically approached the
submarine problem from all angles, experimenting finding and
destroying submarines, attempting prevent torpedoes from
hitting merchant ships, and finally devising methods make
shipping harder for the submarine see. His next plan was locate the submarine measuring
. None these approaches could locate submarines a
distance— the vital prerequisite submarine detection
system.
His work ship camouflage was the beginning strategy
that had great success two world wars. the beginning the war the
best way locate submarines underwater was listen for
them.XII- 7
Unrestricted submarine warfare was the final straw that
brought the United States into the War 1917. had all sorts of
ideas evade German torpedo: suggested laying film of
oil the surface obscure the submarine's periscope, he
toyed with the idea protection system for ships using nets
fired into torpedo's path, and designed sea anchor to
rapidly change vessel's heading once torpedo was sighted
