Subsonic vs. Supersonic

Subsonic vs. Supersonic — Is There a Difference?
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Difference Between Subsonic and Supersonic

Subsonicadjective

(of a sound, scientific) having a frequency too low to be audible

Supersonicadjective

(of a speed) greater than the speed of sound (in the same medium, and at the same temperature and pressure)

Subsonicadjective

(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)

Supersonicadjective

ultrasonic, having a frequency too high to be audible

Subsonicadjective

(of a speed) (aviation) less than the speed of sound (in the same medium, and at the same temperature and pressure)

Supersonicnoun

An aircraft that can travel at the speed of sound.

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Subsonicadjective

with a Mach number such that 0.3 < Ma < 0.8 (approximately - the exact limits vary between sources)

Supersonicadjective

(of speed) greater than the speed of sound in a given medium (especially air);

a supersonic bomber flies so fast that it must release its bombs while the target is still over the horizonaircraft flying at subsonic speeds

Subsonicnoun

an aircraft whose maximum speed is less than the speed of sound

Supersonicadjective

having frequencies above those of audible sound

Subsonicadjective

(of speed) less than that of sound in a designated medium;

aircraft flying at subsonic speedsa supersonic bomber flies so fast that it must release its bombs while the target is still over the horizon