Ya learn something new everyday! I never knew this was an actual thing. Sure explains a couple incidents I have had in the game!
https://en.m.wikipedia.org/wiki/Acoustic_torpedo
"On the Allied side, the US Navy developed the Mark 24 mine, and was actually an aircraft launched, anti-submarine passive acoustic homing torpedo. The first production Mk. 24s were delivered to the U.S. Navy in March 1943, and it scored its first verified combat kills in May 1943. About 204 torpedoes were launched against submarine targets, with 37 Axis submarines being sunk and a further 18 damaged."