The term describes motion or phenomena exceeding the speed of sound. A common example is the movement of certain aircraft, which, upon surpassing this speed threshold, generate a noticeable shockwave and associated sonic boom. This speed is dependent on the medium through which it travels; in dry air at 20C, it is approximately 343 meters per second (roughly 1,235 kilometers per hour or 767 miles per hour).
Achieving speeds beyond this threshold has significant implications across various fields. Historically, its attainment in aviation marked a technological milestone, enabling faster travel and altered strategic military capabilities. The development of aircraft capable of these velocities demanded advancements in aerodynamics, materials science, and propulsion systems. The study of related effects on structures and the environment continues to be a critical area of research.
