GWX3G - hydrophone,external noises a bit too loud

[Paul Riley]

I was wondering if there was a way to lower or completely remove the external noises while listening in on the HPs,especially that damn ticking clock.I cant really imagine the internal noises in the UBoat would be that loud while listening with the headphones on,and it gets a bit worse if you turn up your own earphones connected to your speakers.This is not a MAJOR problem,but the sounds do seem to distract a little from the noises I am trying to pick up,especially very distant/quiet sounds.

Cheers.