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
black boxes, what do you use the bluefin for? the bluefin vehicles have been used for over 15 years. originally they were used for ocean graphic research. very first crews were done in an articca. used in the artic to study global climate change. used for alternative energy, offshore wind farms. it seems that we have lost the ceo. anyway, we thank him. australian searchers are calling the pings the most promising lead yet. we have heard that one before. are we really any closer to finding the missing plane? joining us underwater search expert coal leenel keller. hank whitmore and air safety investigator matt robinson. matt, we keep hearing about these pings are these picks something you can hear with the human ear or something different? it requires a hydro phone, greta. and it does sound a bit more like a chirp. a frequency that you can t
no questions? no. everyone agree? my question to paul would be what is the receiver they re getting this on receiver. so you wouldn t actually hear this would this be something to the human ear? that s interesting. you said you can hear it, but it also has a visible well, you can hear my example. my example was one thousand cycles, well within hearing range. but in actuality, we re looking for something that is about double the human s highest limit of hearing when you re a baby. and it decreases after that. so you would not hear it. but you would see the wave form on a specialized receiver. and if you incorporate filters to mask or minimize any frequencies that are outside a certain band centered on what you re looking for, it will
there s one of these on the cockpit voice recorder and data recorder. two boxes, that s the battery. this battery does not keep the memory in it, the memory s already stored, it s solid. even after this goes off, the data is still stored in here. i ve had that question. this battery is for the actual pinging sound? that s correct. and we have a thing of water here. how does it work? i ll place it in there in a second. what s going to happen, we have 37 kilo hertz. which is higher that the human ear can hear. but it moves through water pretty well. what we have here is the connecter, the plastic area in between, keeps it isolated, as soon as the water connects that dot with this case is when it starts do you know what distance it can broadcast from? it s supposed to go up to 3 miles. now remember, as gallo, i m sure, will point out here, there s a lot of interference. you can hide submarines under thermal differences in the water.
and director of special projects is with us. former transportation general mary schiavo, and analyst and veteran pilot miles o brien. david, you have the pinger, explain how it works. this is the pinger, it gets replaced on the c check. there s one of these on the cockpit voice recorder and data recorder. two boxes, that s the battery. this battery does not keep the memory in it, the memory s already stored, it s solid. even after this goes off, the data is still stored in here. i ve had that question. this battery is for the actual pinging sound? krast that s correct. and we have a thing of water here. how does it work? i ll place it in there in a second. what s going to happen, we have 37 kilo hertz. which is higher that the human