The most successful
submarine detection device that came out all this research
effort was still acoustic device— the broca tube which
IO
resembled elaborate stethoscope. and AT&T
were highly interested the potential radio and their
laboratories were well versed this new electronic
technology. This method was considered be
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found this out. Yet they met with the same problems Edison and
had the same lack practical results.
Instead acoustic amplifier, found the phonograph
diaphragm, they tried electronic amplification with an
oscillator designed Reginald Fessenden. had successfully used his device for detecting
icebergs after the tragic sinking the Titanic. one time a
"mucker" the West Orange laboratory, Fessenden was now a
pioneer radio and the first man transmit music radio
waves. This was achieved the scientists the Allied
Submarine Detection Investigation Committee England who
named their creation ASDIC. The essence this idea was electronically
generate ultrasonic waves and bounce them off metal objects
underwater.
An electronic device did finally produce the important
breakthrough submarine detection. This was the development
of active sonar system which used reflected sound waves to
detect submarines instead the passive system listening
for them. group, including scientists from the research
laboratories and AT&T, attacked the problem submarine
location experimental station Nahant, Massachusetts
