Before revision: The modern term for this meaning is "ultrasonic", but the older meaning sometimes still lives on, as in the word [ superheteerodyne ] Supersonic objects upright=1.15|British Airways Concorde in early BA livery at London-Heathrow Airport, in the early 1980s The tip of a bullwhip is thought to be the first object designed to break the sound barrier, resulting in the telltale "crack" (actually a small sonic boom).
After revision: The modern term for this meaning is "ultrasonic", but the older meaning sometimes still lives on, as in the word [ superheterodyne ] Supersonic objects upright=1.15|British Airways Concorde in early BA livery at London-Heathrow Airport, in the early 1980s The tip of a bullwhip is thought to be the first object designed to break the sound barrier, resulting in the telltale "crack" (actually a small sonic boom).