You're right...don't know what the hell I was hearing there.
Having now heard it without the kids running around me...it sounds like someone hailing somone over the radio. But I am not sure the first bit we hear is part of the actual call.
"You don't understand" or "You don't have to stop" Still not sure here???
"Prometheus, Prometheus, Prometheus"
"I was wrong, it was so wrong, and I'm so sorry"
IMO What we are hearing is a call from, Shaw, back to the Prometheus. The beginning of the transmission is just distorted a little so the first two Prometheus don't come across they are cut short and are quite faint.
Don't think there is anything about coming or leaving though.