There is a new type of ringtone, known as a silent or misquito ringtone. Its created so teens can have there cellphones go off and teachers wont know. This is at a decible range so high that not many people over 20 can hear it. Its really kool and ive tested this. Im 15, and my parents are in there 40s, and they thought this was a trick. Im dead serious this works, and its crazy kool. If u have bad hearing, u obviously will not hear this. Heres the link:
http://download.npr.org/anon.npr-mp3...c_teenbuzz.mp3