CNN CNN Newsroom April 9, 2014 19:58:00
Click coming in that's the sound of the pinger. you can have a visual representation of it. so, what we see here is the frequency that the sonar's picking up or hydrophone is picking up in the water and there's energy in a band. if you're looking for the underwater locator beacon, you would make sure that's in the 37 kill low hertz band. they're looking at right sound the. >> reporter: other thing they're doing is side scan sonar, that can see more what's underneath the boat, right? >> right. this is done in stages. we've done the stage of isolating the rough area, we want to get an image of w...
Source: archive.org