Students Find Ring Tone Adults Can't Hear

Young students are using the special ring tone. It is actually made for elimination of teenagers who loiter in front of stores. User can download ring tone which is too high pitched to be heard by most adults. However, some young students can receive message without the teacher knowing.

Since 1990, our technology have changed and developed rapidly, so we can get a lot of better life from various kinds of machine, but sometimes we are in troubles because of the technology. One of the exapmples is the cell-phone. It can obviously give to us convenience to call because we can call anywhere. However, nowadays almost all people cannot live without the cell-phone because we are already accustomed by the cell-phone. Also, like this news, many young students are playing with their friends during calss time. We should know to control ourselves from technology, but unconditional developing technology.

article
ERIC