the folks in australia spearheading this search. important enough that they head a news conference out of their normal area to bring us the information. what else did he say about the sound and why this sound in particular could be from an airliner and not something else coming from the ocean, like marine life. what about the significance of the length of the sound? reporter: well, he said that it s significant in that it s consistent with the kinds of sounds that would be emanating from the black box pinger, 34.75 kilohertz. but again, this all needs to be verified. this at the moment is raw data. he emphasized the area the sounds were heard in were about 4 kilometers deep, incredibly