Excellent phenomenon of "singing stones"

Singing may not only people, but also some of the stones, and all you need to do - it's like to be prislushatsya



Worldwide, there are fields with strange boulders that "sing" when to listen to them. Today, and you will have the opportunity to listen to some "singing stones", and yet you know that scientists think of this "music».

Fields filled with strange boulders, there are around the world. One such field is in Pennsylvania. One UK. One in California. Throw a pebble in a normal field, and the stones in it will publish a boring bryakayuschy sound that would be expected. The sound of other will echo as if thrown pebbles fell into an empty aluminum cans. Such stones are called "singing" or "ringing", and they are all of volcanic origin.



We hear only part of the sound produced by these boulders. Besides this part, boulders make sounds at frequencies that are either too low or too high, so we can not hear them. The boulders are made of basalt, a typical volcanic rock with a high iron content. His in basalt can be 10-15%, and this is the reason why the boulders ring. However, what we hear is not the sound of metal. This is the sound of a large internal stress. When the sound "singing stones" compared with the conventional sound of stones, special stress sensors showed that the internal structure of "singing stones" at the moment "singing" was on the verge of destruction.

via factroom.ru