My 20-something year old daughter brought this to my attention... It's called an adult proof ringtone that only teens and some older people can hear. I thought it was a bit far fetched but it turned out to be true.

When I played at a high volume, she told me to turn it down because the noise was annoying.

Old deaf me, I couldn't hear a thing!

Teens are using these rigntones for their phones so that their teachers and their parents can't hear their phones when they ring.

Check out the story using the link below then download the ringtone and gather up the kiddies and see who can hear it.

http://www.npr.org/templates/story/story.php?storyId=5434687