SangP,
I didn't know you were also interested in full-face masks until I stumbled into this thread. I have used several, and for just regular diving I do like the AGA mask. Years ago I wanted to get a simple communication system going, but never did. Rather than using a wireless system, which is pretty expensive, I thought about using a hard-wire intercom system, only using waterproof components, and making it so that the wire could be unplugged when you want to. We used to use (and they probably still do) these kinds of systems to talk on board military helicopters. We could plug in whenever we wanted and talk, then unplug. Well, I never got that idea off the ground, but with your ability I thought I'd throw it out there. It shouldn't be too difficult to get the waterproof mikes and ear phones, and put together a waterproof tube to house some simple electronics. The tricky part may be to get a coupling you could take apart when you want to.
One other communications technique I have used, which you can use now, is simply to take your mouthpiece out of your mouth, move your mask down over your mouth, and shout at close distance. I have used that, and my buddy understood what I was saying, in warm fresh water; 'probably isn't a good idea in cold water where you're using a hood though. And, it would work better with the older, large volume masks.
SeaRat
