Nothing gets a teacher more angry than the sound of phones ringing in class. It totally ruins the momentum of teaching, and distracts all around. A lot of schools across the nation are starting to ban phones at schools (much to the anger of parents.... all of whom need to get over themselves).
Enter a new program that adjusts the frequency of ringing just above the range of most adult humans, but still audible to the younger crew. I applaud this, and I hope there was a way such that the kids using them had a way to talk at a frequency that I couldn't hear.
What makes it even better is that the original idea of exploiting different audible ranges in different ages, was meant to keep kids from loitering.
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