CNN CNN Newsroom April 6, 2014 23:04:00
Is here back with us as well working until the midnight hour, well past the midnight hour last night. paul ginsberg is with us here. i'm very excited to have him. a forensic audio expert in the business of analyzing black box recordings. so, paul, thank you. i want to start with you. it is so fascinating when i heard from you, then we've been speaking a little bit before. are you skeptical about these pulse signals because they weren't continuous like they should be? >> exactly. if there's something transmitting, you expect it to be continuous. as long as you don't go out of range of reception...