Ralph Gunderman, the amiable voice artist and actor who spent more than a decade as the announcer on NBC’s Dateline while contributing to comedy bits on Late Show With David Letterman , has died. He was 77. Gunderman died March 1 at Lenox Hill Hospital in New York of complications from pneumonia, a family spokesperson announced. The Cleveland native moved to New York in 1981 and worked as a freelance national voice-over artist until his retirement in 2021, heard on thousands of commercials, promos and narrations over those four decades. On CBS’ Late Show , Gunderman often provided the voice for fake “announcements” and “commercials” during Letterman’s monologues as a member of a small band of actors that included Sara Krieger, Sam Fried, Robb Webb and J.R. Horne. He also could be heard on films (2003’s Red Betsy ), animated TV series ( Our Cartoon President ) and video games ( Star Wars: The Old Republic ). The fourth of seven children, Gunderman was born in Cleveland on Sept. 6, 1948.…