Sounds leave cues about the wear and tear on cars, power tools and other devices. By identifying the sounds a startup aims to improve the repair and performance of vehicles, traffic signals and more.

As electric vehicles (EVs) become more common on the streets, pedestrians, cyclists, and other vulnerable road users are encountering more and more artificial warning sounds. These signals—known as ...

Rules of the road. The National Highway Traffic Safety Administration says new electric cars and hybrids must emit noise when operating at speeds below roughly 20 mph.

New York City's latest weapon in its fight against street noise is a traffic camera equipped with a sound meter.

Suppose you're in heavy traffic, you blow your horn, and it sounds like this. (SOUNDBITE OF MUSIC) INSKEEP: That's the plan of the federal transport minister in India.

New York City's latest weapon in its fight against street noise is a traffic camera equipped with a sound meter. At least 71 drivers have gotten tickets so far.