Noise Could be Clue to MH370.
PEREIRA: Could an underwater sound be related to the final moments of Flight 370? An Australian university has released audio recordings picked up by underwater listening devices.</s>BERMAN: Researchers say it is a long shot but it's possible this sound may have been the impact of the plane on the water or an implosion of parts of the craft as it sank and fell in upon itself. We want you to listen, judge for yourself. It is very subtle. So the researchers think that came from the area on this map, which is thousands of miles northwest, I mean, thousands of miles northwest from the current search area in the Southern Indian Ocean. But they say it could be just as likely it was a natural event, an underwater earthquake, a landslide, not related to the plane. What was it? Joining us now, CNN safety analyst, David Soucie, to tell us exclusively. David, you've investigated accidents before, crashes like this, maybe you heard something different.</s>DAVID SOUCIE, CNN SAFETY ANALYST: You know what I heard was a low frequency vibration. There's a pulse going on, and this pulse, you couldn't hear with the human ear. You would feel it perhaps but you wouldn't be able to hear it with the human ear. They'd sped it up so you can interpret it by the human ear. So that's not really what it sounds like. Remember, the lower frequencies in the ocean travel much, much further than higher frequencies. That's what you'll here, that low frequency pulse. It won't give you much characteristics to tell you specifically what it was.</s>PEREIRA: What's interesting is we showed the map a second ago, the area of interest where the sound came from is a very large area. It's also very far from the arc. So the arc is provided by the information, provided by Inmarsat. So if the Inmarsat data is -- let's say this is right and this sound is from the plane, that means the Inmarsat data would be wrong.</s>SOUCIE: Yeah, it does, we all know Inmarsat data is under scrutiny from outside sources. But as crucial as that is, it doesn't discount the fact those arcs are the best information they have. One, it's not very specific, so it's hard to say it is the aircraft. Could just as easily have been a small earthquake or other movement in the ocean. So it's not really conclusive. So to try to, you know, dissuade the search that's ongoing now, I don't think that's going to happen. The second reason I have, because these low frequency vibrations can travel for thousands and thousands of miles, I'm not sure how they even figured out where it came from, to be honest with you. It could have just as easily been refracted off another object under the ocean. There's a lot of variables here. I just don't see a lot of credibility in it. I think they're even saying it's a 10 percent chance --</s>BERMAN: What would it take for them to check this out at this point? Search more in the area they're searching now, then in a year, come back to this and say, there was this would be thing, maybe we should follow up on that?</s>SOUCIE: I think it would take -- at this point with what they have, I think it would take an exhaustive search of the existing area. Then maybe start grasping at further straws further away. But I still put all the faith down in the lower arc.</s>PEREIRA: David Soucie, always a pleasure. We'll be watching to see if this turns into something or not. 10 percent, as you said, is a very low, low piece of fact they can follow.</s>BERMAN: We'll be listening in this case.</s>PEREIRA: More importantly, we'll be listening. I want to share something, also from Australia, on a much, much lighter note, Lego. Legoland craze created quite a black market for those bricks.</s>BERMAN: So Australian police are on the lookout for thieves who stole $15,000 worth of Legos from a huge toy store north of Melbourne. This was a high-tech operation. Removed apparently the store's glass. They raced off in a van. Apparently they were targeting the Legos. Police say the professionalism of this operation suggests there could be a syndicate specifically targeting Lego. A Lego crime syndicate in Australia. You thought we had problems.</s>PEREIRA: That's it for us @THISHOUR. I'm Michaela Pereira.</s>BERMAN: And I'm John Berman. "LEGAL VIEW" with Ashleigh Banfield starts right now.