Intermittent sound file of torpedo loading

Ok, in all the time I've played SHIII I have never heard this sound before, until installing GWX 2 and U-boat 1.2. When a torpedo tube is loaded (and assuming I'm not runing higher than TC4) the WeO can be heard announcing that the tube is loaded. However, now . . .

Now and then, before the WeO announces that, I've been hearing an odd sound I've never heard before. Like a series of soft clunks, then a hydraulic hissing sound ending with a low clunk. And then I hear the standard WeO announcement.

It's a really kewl sound, but . . .

It seems to be intermittent. And I'm not sure why. I'm not sure if it's boat-dependant (i.e., VII versus IX) or crew-dependant (i.e., you need a torpedo-qualified officer maning the WO station) or simply random.

Anyone have any ideers about this?

[Samwolf]

I've noticed that too, it seems to depend on who the Weapons Officer is. Maybe all the WO voices don't have the loading sounds added.