Page 10 - Frequency Range News Today

Interestingly i think has for the most part been superceded by what the russian kz do via internet. they dont have to use these arcane and older technologies. but the cuban kz do it. >> so the colonelilaten, has the u.s. ever used a acoustic attack on any other country? >> not to my knowledge, don. and weve done testing in the acoustic area bt we have never used them on specific targets. either specific individuals or entities in a hostile environment. so there are no records that indicate that ...

>> not to my knowledge, don. and weve done testing in the acoustic area bt we have never used them on specific targets. either specific individuals or entities in a hostile environment. so there are no records that indicate that anything like that has happened. >> why does it make people so ill? >> part of it is because the way in which the human ear, for example, operates. it operates within a certain frequency range. what happens if you go beyond that frequency range, it can actually affect th...

Field. one has already picked up four pings from the towed pinger locator. they drop a line down from a thousand feet and listen basically. it seems one of them got a hit, a ping from the frequency hit from the data recorder. that has given even more optimism to those searches. preliminary data, though -- >> lets talk about that preliminary data. i understand the testing was done overnight to try to analyze if the signal came from flight 370. do we know when well get an update on that, or when t...

Coverage that only cnn can deliver. michael holmes is in perth, australia. lets go there first for the very latest. michael? >> reporter: wolf, a dozen of these sonobuoys have been spread around the search area, sort of an added tool, more electronic ears, if you like, listening for something, anything from malaysia flight 370. this time it was a search plane that picked up a possible signal from flight 370s black boxes. it happened near the same area where the "ocean shield" detected four elect...

>> yeah, erin, that latest ping coming from a sonar buoy. these planes that have been out there, this is really an added tool to the ship that has been towing around that ping locator. what the planes do, they can carry up to 84 of those things. and theyve been peppering the ocean near the ocean shield vessel where which picked up of course the four pings since last saturday. these buoys drop a line a thousand feet down into the ocean, and they listen. well, it seems one of them got a hit, a pin...

>> it is density, water moves because it is dense, if it is salty or cold, the water is actually water that cuts across the sea bed. >> of water that is more dense? >> yeah, it floats, it started to use the antarctic and pours into the basins, the lakings are own more amazing that you can go to the bottom of the ocean and see what looks like a lake at night. >> would it interfere with the towed pinger locators? >> potentially it could, it makes a little bit of extra noise, there are some that ar...

Kilohertz and repulse out every second, a short burst. so if you dont 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 its 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 its dark? >> theres two things...

Dvdr that has the pingers attached to them, which one is which in order to locate this signal? >> well, they have to know what to be listening for. its like trying to listen for extra terrestrial life. you have to know which direction to point your antenna. which frequency range to listen on. what the duration would be. whether or not what youre receiving is noise or is, in fact, what youre looking for. and the manufacturer as well as the installation and operation can no doubt tell you exactly ...

Bottom. >> do you think this is the black box or a natural phenomenon? >> im not a sonar expert, but i think if they are hearing something that is in that frequency range, then theres a chance this could be the black box, i think its a long shot, but i dont know the chinese operators. if the operators had herd this signal and i worked with the operators in the past. those guys are very good. and if they are hearing these pings and they get any sort of confirmation on it, then they have a very go...

I understand it, thats between 10,000 to 15,000 feet deep and 932 miles from perth, australia, which is like new york city to jacksonville, florida, talking about the scope of this area. when youre talking about depth like that, how difficult is it to actually go and get those boxes then? >> well, it can be challenging at times with currents and other factors, but weve done it before. this isnt the first time that weve had to operate at deep ocean depths in order to recover things. so salvage pe...