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Company that made the original flight data recorders. thanks for being with us. as you know, the sophisticated equipment on board this australian ship has twice picked up the signals. do you think they are the pings from the black boxes? what would lead us to believe that they could be? well, as we have talked ab, it s a very unique signature, the 37.5 kilo hertz. it sounded like a steady continuous signal from one of our pingers so we are very cautiously optimistic. 37.5 kilohertz doesn t happen in nature. that means that the battery has lasted longer than 30 days. we knew that the batteries could have expired by that point. what s the best case scenario on how much longer the battery can power the pinger? well, we have some design ....
Also have an air safety expert. if these pings are not coming from flight 370, what else could explain them? well, really it s anyone s guess and we will probably never know. there are a lot of things in the ocean that make a lot of nois. this is a very artificial sounding noise so it boggles the imagination that something natural could create it. but we just don t know, really what could cause a false positive. we do know that there have been numerous false positives so far. it is very much in up in the air. the science tries to avoid this, the 37.5 kilohertz is a frequency not heard in nature? user error might be the answer. as someone pointed out earlier on cnn, there is a lot of ....
It s a frequency designed to be heard not by the human ear, but by acoustic listeners. those acoustic listeners will then provide both a visual reference point, a wave form, and an audio sound which can be heard then by the ear. the pinger is not only designed for the 37.5, but the rhythmic one-second pings. there s many noises in the ocean. some of them are mammal made. others could be from other machinery. the sound we learned last night and over the last few days sound travels far, especially if it gets into the deep sea sound channel. but the pinger, the very noise of the pinger is designed to be unique. it is designed to be identifiable, and that is why angus houston said last night he was encouraged because it had the characteristics of the black ....
Kilohertz and repulse out every second, a short burst. so if you don t know which one is which, it would be very difficult to tell. but the interesting thing is that if you find one, it is quite likely that the other one will not be too far away depending on how the aircraft hit the water but it s quite likely that they will be within a mile of each other. and lastly, for david soucie, do these batteries weaken or is it what happens with my iphone, all of a sudden it s dark? there s two things going on. you have the repeated signal every second and then you have the frequency range as well. as the battery decreases, the frequency band will start to drop like you re changing your radio station, it will start to drop a little bit. now, as far as the second interval, it s going to try to maintain that second interval over the frequency. so both of them will degrade over time but you rarely would see it click and go off. you can see some kind of ....
Able to pick up the fact that there were two different ones. if you had one sort of machines, say another ship in the area with some kind of device emitting a 37.5 megahertz signal with this one per second cycle, it would be unlikely you d have two. so i think that the right megahertz, the right frequencies, the right repetition, one every second or almost every second and the fact that they got two of them really does get people thinking that you ve got the plane and you ve got both of them in relatively close proximity of each other. on the flip side, miles, is there anything here that doesn t fit at least to what we know so far? is there anything that leaves a question in your mind if this is the black box? i don t have many questions about it. the big question will be, of course, the difficulty in recovering. this particular flight path if this is, in fact, the location of the wreckage, would match some of the scenarios we ....