I have 100% no familiarity, but I'd assume it's not processing voice from the ground. It is probably only announcing that this is an emergency and its intended

I have 100% no familiarity, but I'd assume it's not processing voice from the ground. It is probably only announcing that this is an emergency and its intended course of action. I would love to know if that's not true because that would be a huge leap in off-line speech processing and recognition.