The term subsonic can refer to speed that's lower than the speed of sound. In computer terms, this could mean an open source media server or refer to programming code.
The correct term for this is subsonic, not infrasonic. And yeah, I wouldn't want to go above the speed of sound in a hang glider! So, yes, they fly subsonic.
The antonym for subsonic is supersonic.
You could use "hypersonic." It is not a precise synonym, as subsonic is below the threshhold of hearing, whereas hypersonic would be above it. Supersonic would refer to velocity faster than the speed of sound, whereas subsonic also refers to velocities slower than those of the speed of sound. Sonic velocities are a consideration in jet aircraft design and with bullets and marksmanship. Subsonic rifle bullets tend to be more accurate than hypersonic ones
to what does the term coed refer
Subsonic means "slower than the speed of sound" so a subsonic bullet is any bullet that travels slower than the speed of sound.
subsonic
The word you are looking for is "subsonic." This term describes speeds that are slower than the speed of sound.
Subsonic - media server - was created on 2005-02-10.
Supersonic
lmfao
The term used to refer to someone with a Ph.D. is "doctor."
The term used to refer to a quantum of light is a photon.