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They may not be synchronized, according to our audio expert here. were they the same sort of signal, or do you know? >> yeah, that's true. they would most likely not be synchronized. and they obviously were consistent with what we would expect from these black boxes. >> so you're getting both, you believe, cvr and fdr? >> that's the initial indication. but once again, without confirmation, real confirmation will come when we can get the side scan sonar out there down there and get an actual picture. >> commander, it's richard quest. just to confirm this, just for absolutely clarity, sir, are y...

I want you to listen now to angus houston, what he said about detecting this information, and then you and i will talk with our panel of experts here. take a listen. >> i've heard the -- what we got is we got a visual indication on the screen. we've also got an audible signal. the audible signal sounds to me just like an emergency locator beacon. and what we're talking about, there were two separate pingers. >> okay. so you hear what he said there? he said we have visual indication on the screen, which our audio expert here said earlier before we even got wind of this, you said they would be l...

Boxes from the malaysian airlines plane. interestingly they were heard outside the search zone. another acoustic event was also detected by the australian ship ocean shield about 300 miles away. so i go now to my panel. paul ginsburg is an audio expert. and then paul, what are the words acoustic event mean to you? >> i was wondering why they use that term. i assume it means they weren't sure. that there was something that could or could not have been the pinger. it may have been distorted as others have said by the propagation through the water, the variation in speed of the sound between the ...

Board that ship, which is the ocean shield, which is an australian ship that is carrying a u.s. pinger locator, towing a u.s. pinger locator. turned off all the noise producing equipment, lowered their device to 1400 feet. and they said they got some stronger and then it faded out because they were moving away from it, which they said was encouraging. then they said they reeled it in and they did a course change. and then when they turned around, once they did the course change, they lowered it to 3,000 meters, and then detected it for about 15 more minutes. and everything that the commander t...

Character information on trayvon martin, specifically that he smoked weed, that he liked to fight, he took pictures of fighting on his cell phone but if the prosecution opens the door to george zimmerman's character, that stuff may come in later. >> reporter: nelson also ruled in favor of zimmerman's defense by keeping the prosecution's audio expert from testifying that it was trayvon martin's voice on recorded audio the night he was killed, a potentially crucial witness for the prosecution. >> it was the cornerstone of the state's case saying it was in fact trayvon martin's voice who was scre...