NEW YORK - Students are using a new ring tone to receive
messages in class and many teachers can't even hear the
ring.
Some students are downloading a ring tone off the Internet that is
too high-pitched to be heard by most adults.
With it, high schoolers can receive text message alerts on their
cell phones without the teacher knowing.
As people age, many develop what's known as aging ear a loss of
the ability to hear higher-frequency sounds.
The ring tone is a spin-off of technology that was originally meant
to repel teenagers not help them. A Welsh security company
developed the tone to help shopkeepers disperse young people
loitering in front of their stores while leaving adults unaffected.
The company called their product the "Mosquito."
Donna Lewis, a teacher in Manhattan, says her colleague played the
ring for a classroom of first-graders and all of them could hear
it, while the adults couldn't hear anything.
Source: http://msnbc.msn.com/id/13274669/?GT1=8211
Click to hear (can you hear it?): http://www.bbc.co.uk/wiltshire/audio/mosquito_sound.mp3
It apparently contains an annoying screech but I can't hear it. I
hear only some street sounds...
