Doh!

Another installment in the series, "The Best laid plans..." blah blah blah.

Have you heard about the mosquito ring tone? It is a high pitched ring tone that teenagers are downloading to their cell phones. Why? you might ask. Because only kids can hear it. That's right, as we age, our ability to hear high frequencies diminishes. So, teenagers set this ring tone on their phones, they get notified of an incoming text message 'in class' and old Mrs. Snodbody the English teacher can't hear it.
It's true. I found THIS and played it for my kids. I could barely hear anything and my two young children were writhing on the ground in pain. It was wild!
The funny thing is that this wasn't developed for cell phone ring tones at all. It was developed to 'scare' away teenagers from convenience stores and parking lots. Store and property owners will set up speakers, play this tone and watch the kids run for their lives. Adults can't hear it so they would walk in and out of the store without even twitching.
Isn't it ironic?