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Whispering in U-boats/submarines when being listened to
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I feel like in a lot of media that portrays submarine crews, whenever they are trying to hide from ASDIC/Sonar the crews are either sitting in silence or whispering to each other. Now, I understand that sound travels effectively in water, but is this equipment so sensitive that it can hear a crew member talking too loudly? To what extent could internal noises be heard?

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I suspect (at least for WW2 and prior) the main reason is psychological. No, they cannot really hear you, but the millennia-old instincts kick in and you lower your voice while the predator is lurking nearby.

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3 months ago