Of all the technologies that I have developed, this one is indeed the wierdest of all. I am rather taken a back by the fact that this can actually happen. Imagine hearing a high pitch, hi volume sound -- not at all pleasant right! well at a frequency of around 5kHz it resonates within your skull, which in turn means that its amplitude may very well be lowered and it will still crack your skull. furthur still, it can be hidden within a more pleasant sound -- music, conversation, whatever. Sizes of skulls are quite unique actually, so you can be quite sure only someone of that skull size picking up the phone will die. creepy already? I have already killed the only pet in the house.
I don't really know what to do with it, but I do know such things can sell for substantial amounts. the higher the amount payed for it, the more confident one can be of the authorities having it rather than someone whom we dont want to give it to. Most of all, a poison must be identified for work on its antidote to start off. If you don't want to die off the next phone call, do please help me deliver this technology to its proper place. simply closing your eyes to such things is never wise.