What the beep?

Sound and fury?
The electronic beep has been compared to the little boy who cried wolf. It's so prevalent in society that most people simply ignore it.
Copyright Audio-Mastering.org

Americans are bombarded by electronic beeps. Microwaves emit them. So do ATMs and elevators, grocery store scanners and waffle makers.

Are all these high-pitched tones really necessary?

Reporter Nikki Tundel tries to makes sense of the electronic beep.