New Yorkers almost expect unintelligible announcements in the subway, with phrases like “the next Brooklyn-bound train” sounding like “2qliun-sojn uaine.” Jay H. Walder, the chairman of the Metropolitan Transportation Authority, the parent of New York City Transit, remembers a “Saturday Night Live” skit about garbled announcements. “In this day and age, there has to be a better way to know a train is coming than by leaning over the edge,” he said.