different between infrasoic vs subsonic

English

From sub- +? sonic.

subsonic (not comparable)

(of a sound, scientific) having a frequency too low to be audible
(of a sound, literary) very quiet, almost inaudible
The noise of the ship was all around her. The faint subsonic rumble of the reactor and drive. (Leviathan Wakes, James S. A. Corey)
(of a speed) (aviation) less than the speed of sound (in the same medium, and at the same temperature and pressure)
(fluid mechanics, of a flow) with a Mach number such that 0.3 < Ma < 0.8 (approximately - the exact limits vary between sources)

subsonic (plural subsonics)

Borrowed from French subsonique.

subsonic m or n (feminine singular subsonic?, masculine plural subsonici, feminine and neuter plural subsonice)

Send