Moviestar, it's not like a 'ping,' rather it's a tone sustained for several seconds. Also, there is no 'pop' of pressure in my ear, like from altitude. Rather it's more a feeling that the pressure around my whole body shifts momentarily.
I don't see how this could ever be studied scientifically because it is entirely random and rare, in my experience. It would be impossible to prove the tones had anything to do with the synchronicity, and, in any case, one can't even prove there is such a thing as synchronicity.
Kind of like nailing jello to the wall.
