The sound barrier describes the sharp rise in drag an aircraft faces near Mach 1, and a sonic boom is the shock wave heard when it passes that speed. Chuck Yeager first broke it in level flight in 1947 in the Bell X-1. Recordings of jets producing that crack later circulated in documentaries, games and flight videos, then as a standalone meme sound effect online. Creators now reuse the boom out of context to exaggerate any sudden burst of speed.