The mystery of strange sounds heard worldwide

There is an odd mystery that is supposedly going about the entire world about strange, unexplainable sounds being heard from "who knows where?" There have been more than a few of these cases which have almost certainly been ruled out from being caused by planes, drilling/mining operations, meteor explosions, or anything of that nature. One of the most famous cases would be that of Taos, New Mexico. This is a low frequency humming sound that can only be heard by people of over about sixty years or so of age. Now, there is something like this, another phenomenon, that is also unexplained. That is, there are supposed regions of the Earth in which the Earthly magnetic fields are exceptionally powerful. Also, these areas are thought to exist in a perfect grid. That is, they are all equally spaced together from each other. And yes, one of these areas would include the Bermuda Triangle. It has also been hypothesized that there is also another hazardous marine triangle which exists between the border of the United States and Canada. This area is located over Lake Superior. Alaska is also thought to be an area in which a mysterious triangle exists. Here is some more information about the most recent observation. I myself have at times heard of these things myself whenever I've spent time outdoors.