sound, they can figure out what happened a plane's cockpit. the sounds are actually from alerts from cockpit recorders and alerts can indicate scenarios like an engine fire or sudden drop in altitude, some of the theories of what happened to the missing malaysian jet. we want to bring in paul ginsburg look with the rest, michael kay here and mary schiavo on the line. as you listened to that sound, we had first fuzzy kind. i want to play for viewers an enhanced version of that same cockpit alert. have a list been en to this one. so a couple things this indicates. one it indicates you really need an expert to listen to this audio because the raw stuff is just hard to discern. but once an expert like you listens to something like that, what kind of alert are we hearing there? >> we were listening to a cockpit area microphone, a