CNN At This Hour With Berman and Michaela June 4, 2014 15:57:00
Low frequency vibration. there's a pulse going on, and this pulse, you couldn't hear with the human ear. you would feel it perhaps but you wouldn't be able to hear it with the human ear. they'd sped it up so you can interpret it by the human ear. so that's not really what it sounds like. remember, the lower frequencies in the ocean travel much, much further than higher frequencies. that's what you'll here, that low frequency pulse. it won't give you much characteristics to tell you specifically what it was. >> we showed the map a second ago. the area of interest where the sound came from is a ...
Source: archive.org