No engine sound

[Polak2]

Did search came with this:
http://www.subsim.com/radioroom/showthread.php?t=100523&highlight=engine+sound
Some funny, but not too helpful. Do not hear also my own "baffles" in sonar screen. I guess I am playing "silent hunter" after all, but still I'd prefer to have some sound. Thanks in advance for any help.

[Polak2]

I am submerged and heading towards Gibraltar. Some 3 contacts have been detected and are ploted on the map. But when I go to Hydrophone Station -dead silence. So who's detected those contacts? Is this that engine sound related ?
I remember I could hear hydrophone contacs other times?