Hypersonic vs Supersonic - What's the difference?
hypersonic | supersonic | Related terms |
(of a speed, aviation) equal to, or greater than, or capable of achieving, five times the speed of sound.
(of a speed, aeronautics) far enough above the speed of sound as to cause significant differences in behaviour due to chemical reactions or disassociation of the air.
(of a speed) greater than the speed of sound (in the same medium, and at the same temperature and pressure)
(colloquial, of a sound) ultrasonic, having a frequency too high to be audible