A study shows that rattlesnake rattling works as a powerful warning signal that scares animals and prevents dangerous encounters in the wild.

Millions of Germans will have their cell phones sound again this Thursday. A statewide warning day is taking place in several ...

Simple two-tone warning sounds on electric vehicles make it harder for pedestrians to locate cars, especially when multiple vehicles are present Traditional engine noise performs significantly better ...

Weather sirens are kind of my thing. I didn't mean for it to happen; you write a few news stories about outdoor warning sirens and start tweeting (back when we said tweeting) about monthly siren tests ...

As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 141, "Minimum Sound Requirements for Hybrid Electric Vehicles." ...