odd ships with wrong engine sound?? opmonsun

[alphlvr]

i keep finding ships that have the sinking sound for the engine noise, i hear it on the hydrophone and if i get close on the surface.

latest example is a M-KF-M(a) flying a swedish flag (dec 1939, east coast of blighty) that sailed past making the `scufandare`sinking noise rather than a engine sound?

i keep getting this behavior, i even bought the gold version as well to try and eliminate it, as well as reinstalling xp and trying different computers.

when i find a convoy one ship is usually playing the sinking noise for its engine sound, its a real immersion killer, has anyone else noticed this?
i originally thought it was ships that had struck mines, but when i went to investigate they are doing 12 knots and sail past me quite happily except with a disguised engine noise. (crafty)

fresh gold install on a fresh xp
om 705
om 705 - 720
om720 patvh 4
omegu 300
omegu 300 patch6

its really annoying me, can anyone shed any light onthis? about 1 in 10 ships are doing it

am i really the only person who gets this?