The chime comes from the Long Island Rail Road, the commuter rail network serving Long Island and New York City, where the bing bong precedes automated announcements on board trains. Regular riders shared recordings online, and the sound spread on social media as a shorthand for New York transit and for any overly formal announcement about to follow. It now sits alongside other chime memes like the Taco Bell Bong, but commuters recognise the LIRR version instantly for its clean two-note tone and everyday familiarity.