was -- or the co-pilot was busy because he was grabbing a cup of coffee. >> but it still does offer at least something? >> not from my perspective, it does not. >> what is important, don, is the consistency of the audio information that we're hearing. what that means is when you listen to the voice on start up and delivery frequency, is that the same voice that you hear right up until the very last piece on the transcript, or are there two voices that are consistent in terms of that. >> let's talk about the black boxes now. if the battery still works this is what it sounds like when a black box sends off a beacon signal. are the reported pulse signals that a chinese ship heard, are they the real thing.