In a twist redolent of Mind Hacks, the NY Times reports on a ringtone that can be heard by teenagers but not by most adults. According to the story, “In settings where cellphone use is forbidden — in class, for example — it is perfect for signaling the arrival of a text message without being detected by an elder of the species.” It’s quite amusing, though, that the high pitched tone was originally developed as a product to drive away loitering teenagers while not bothering adults. So the spread of this ringtone for the opposite effect is quite a clever hack. That being said, this story makes me wonder what other products might be developed by exploiting physiological differences between people. Jedi mind tricks, here we come :-)