Why were submarines not made sound proof?
They were and are
We have to remember that the term soundproof suggests an unreachable ideal terrestrially. All real-world soundproofing systems are only partially effective. You can reduce sound but you can never completely eliminate it in practise (outside a ...
While a staple of entertainment, single transient noises from the crew are not that significant in locating a submarine as there are many sources of biological noise in the ocean.
Far more significant are rhythmic/cyclic noises from machinery that are both 'louder' and have patterns that make them easier to pick out.
Therefore Submarines are 'sound ...