subsonic (suomeksi)

Määritelmät:

(lb, en, of a sound, scientific) having a frequency too low to be audible
(lb, en, of a sound, literary) very quiet, almost inaudible
(lb, en, of a speed) less than the speed of sound (in the same medium, and at the same temperature and pressure)
(lb, en, fluid mechanics, of a flow) with a Mach number such that 0.3 < Ma < 0.8 (approximately - the exact limits vary between sources).
An aircraft whose maximum speed is less than the speed of sound.