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10-25-12, 12:17 AM

I can sometimes hear aircraft's sound, too but it doesn't bother me. I'm not good at physics and acoustics but I can imagine the propeller of an aircraft (which is much louder than a marine propeller) roughly above you in low altitude could be heard inside a submerged U-boat just as the screw of a surface vessel. It's still a question that why the sound is the same loud on the surface and on 70 meters.

10-25-12, 12:17 AM	#2
allievo Stowaway Posts: n/a Downloads: Uploads:	I can sometimes hear aircraft's sound, too but it doesn't bother me. I'm not good at physics and acoustics but I can imagine the propeller of an aircraft (which is much louder than a marine propeller) roughly above you in low altitude could be heard inside a submerged U-boat just as the screw of a surface vessel. It's still a question that why the sound is the same loud on the surface and on 70 meters.