In the European Union, new models of electric vehicles must make some sort of noise to address some safety concerns. Some carmakers are already doing that, and they’re taking it as an opportunity to craft signature sounds. Marketplace’s Jed Kim spoke with BBC journalist Chris Vallance, who reported about some of the things designers need to think about when making new car sounds. This is a re-air episode, which originally was published on Jul. 15, 2019. (9/2/2019)