Talking Teslas might warn pedestrians—and perhaps express a bit more

2018 Tesla Model 3Pedestrian warning sounds for electric cars are sometimes a fun extension of the vehicle; but they’re more often dissonant with the rest of the experience—a bit like a bongo drum at the opera, or a geeky science fiction reference thrown out in the middle of golf-course outing. In short, electric cars are silent, and so having them make...