Page 11 - Frequency Range News Today

Oceans. richard quest is a cnn aviation correspondent and arnold carr joins us. how can they be sure the sound is from a pinger, greg? >> we clearly need more information. i would like to see what kind of hydrophone which is the instrument you hear these things on. an underwater microphone. see which type of hydrophone they are using. a readout and our sonar expert here is probably better equipped to actually look at that. you have to keep in mind there is a lot of sources, potential sources, in...

Those pings yesterday. they are not very loud. >> they occur in a frequency range not common, that helps resolve it against background noise. there is a problem having to be over the top of it. it assumes all things ideal, density layer, those can act as a mirror and reflect sound away. >> all of a sudden lets say we find something and have to be below. there as ship, not just ro v attached to a ship pitching and rolling. >> you always have to deploy off a ship. even to deploy it off the ship yo...

Had to say this morning. >> my view in this case is that recording isnt even remotely syncable, comparison purposes f it had been submitted to my lab just for prosecution agency, it wouldnt have even gotten to first base. >> what the states witnesses are saying is that you can make out, once you pull out of that 911 call, the callers a voice and the dispatchers voice, you can then isolate some of the screams that you hear and compare those to george zimmermans voice taken from the re-enactment t...

Something. joining us is john, a former ntsb official. and john, thank you. i dont know if you were able to watch the report, but australian authorities agree with the chinese searcher that it is consistent with a black box. if it is not that, what else could it be? >> animals can make sounds like the recorder, maunly whales because they community in about the same frequency range. but the steady 90 second signal is encouraging and i hope and pray for the familys sake it is the box and so they c...