also have an air safety expert. if these pings are not coming from flight 370, what else could explain them? well, really it s anyone s guess and we will probably never know. there are a lot of things in the ocean that make a lot of nois. this is a very artificial sounding noise so it boggles the imagination that something natural could create it. but we just don t know, really what could cause a false positive. we do know that there have been numerous false positives so far. it is very much in up in the air. the science tries to avoid this, the 37.5 kilohertz is a frequency not heard in nature? user error might be the answer. as someone pointed out earlier on cnn, there is a lot of