Money Hyundai thinks new 2020 Sonata sound feature will keep drivers calm in traffic December 10, 2019Mark Phelan, Detroit Free PressComments Off on Hyundai thinks new 2020 Sonata sound feature will keep drivers calm in traffic The Nature Sound feature on the 2020 Hyundai Sonata seems like the noise generators some people use to offset the city's bustle so they can sleep.