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Engineering the Most Annoying Sound Ever

Alarms come in many forms; from the gentle ping of a text message notification to the wake-up wail of a bedside clock, these sounds are a part of our lives. That's why an alarm that could actually save your life needs to be so attention-grabbing—and intensely annoying. This is how Carryl Baldwin, a human factors psychologist at Virginia's George Mason University, designed the most annoying sound possible to warn drivers of head-on collisions.