I'm familiar with cases of people wearing noise canceling headphones on a job site being killed because they didn't hear the beep and were struck by a machine t

I'm familiar with cases of people wearing noise canceling headphones on a job site being killed because they didn't hear the beep and were struck by a machine they didn't notice. The beep is for safety. The annoyingness makes it hard to ignore which is good for safety. Anything that tries to replace it needs to keep safety up. It can't be easy to ignore. I can't require headphones on a person (what if the battery dies after 8 hours and they are working a 12 hour shift... or any number of other things). So many organizations are pushing safety. Governments who want to protect people. Insurance companies who don't want to pay the cost (and put requirements on construction companies). And people who don't want to die or get maimed. A patent on an idea doesn't mean it works to get people to notice who have been around the equipment for 3 or 6 or more months. I would love to see some research on it. That annoying beep works well so it's hard to replace.