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CNN CNN Special Report April 8, 2014 05:10:00

Not possible. but in actual fact, we spoke to some oceanographers, some experts in this field here locally, and they say, yes, it is technically possible that they did, because of the ocean liars, the gradient, the temperatures, it s technically possible they picked up the same ping from the black boxes, if that s what they turn out to be. indeed, yes, the answer is yes. mike, i imagine there s a lot of noise in the ocean. what other, if any other, natural sounds, could be confused for the pinger? we ve talked about this throughout the day. we can t really identify a sound that would be misconstrued as this pinger sound. as you heard earlier, there s multiple aspects to the pinger. not just the frequency, but the pulse rate, the repetition rate, and it appears to be consistent with what we would expect to hear from an aircraft pinger. yeah, as paul has been saying all along, there are other signatures that go along with these emergency pingers, and it appears from the information ....

Mike Dean , Natural Sounds , Pinger Sound , Emergency Pingers , Aircraft Pinger , Paul Ginsburg , Repetition Rate , Pulse Rate ,

CNN Erin Burnett OutFront April 8, 2014 03:53:00

Unless it s a very well-trained mammal, who has good laboratory technique. we can measure to ten thousandths of a second on the repetition rate. and we expect that not to vary. and we talked about certain signatures, because you have certain repetition rates and certain signals and all of that. and some aquatic life or ocean life, an animal or mammal would have to do the same sort of thing in order to repeat that and that s highly, highly unlikely. let s move on now. leyla says, where exactly are each of the black boxes located on the plane? jim tilmon? well, there are a number of places they generally put them. generally, most airplanes will have the boxes in the tail, in the vertical fin. some place, they think, is going to survive the worst part of a crash. a few of them have been, from time to time, put further forward and high in the fuselage, but most are near the ....

Laboratory Technique , Thousandths Ofa Second , Al L , Repetition Rate , Repetition Rates , Aquatic Life Or Ocean , Jim Tilmon ,

CNN CNN Newsroom April 6, 2014 23:06:00

It transmits in each cycle. where a cycle is apparently one second. but it could, perhaps, transmit by .1 second. or .2 second. you can compare characteristics to what the manufacturer says you have to know what type of who manufactured the black box on that plane and you would know. exactly. the folks who are out on the water, right, who are using these instruments, these hydrophones, can they record what they have found and then compare it to the type of instrument on the plane? absolutely. in fact, they can record not using tape recorders, but digital recorders. i have a number of sets of software packages that would allow me to do that were i on the scene. repetition rate of received pulses. right. that s the that s the one ....

Feed It , Black Box , Wasn T , Repetition Rate , Tape Recorders ,

CNN CNN Newsroom April 6, 2014 23:05:00

Explanation as to what and we have some visuals to show of that. you have very simple explanation as to how we figure this out, if it s actually pings from the black box. you say number one is frequency. yes. we re looking for 37.5 kilohertz. okay. on the screen you see two different wave forms. one is of a constant frequency. and the other one is what we call a chirp. where you see on the left side and the right side, they re different frequencies. they re varying, different amounts. so if this pinger was programmed to be a chirp, you would recognize that and it would be differentiated from anything else that was not with that particular frequency, duration, repetition rate, lots of different ways to describe it. we re going to have some sound of that in just a little bit. so it s either a pure tone or chirp. you said the duration of a tone burst. yes. the manufacturer sets how long ....

Black Box , 37 5 , Wave Forms , Anything Else , Chirping Sound , Repetition Rate , Stone Burst ,