Hi chaps, I'm pretty sure the PS3 pocket sound effects qualify as a bug - shouldn't have slipped through but these things can happen. The levels are way off so I'm hoping that we can remedy the situation with a patch at some point in the near future. I'll be trying to get this done ASAP.
On another note, thanks for the comments re HK on PS Vita - we're so pleased to have received such awesome feedback from everyone that's played it! It really does make it all worthwhile to know that so many people are having fun
A huge thank you on behalf of the whole team!