Of, relating to, or being the speed of sound in a medium.
From L. sonus, → sound.
Sedâyi, pertaining to sedâ, → sound.
qariv-e sedâ (#)
Fr.: bang sonique
A noise caused by a shock wave that emanates from an object traveling at or above the speed of sound.
→ sonic; boom, M.E. bombon, bummyn "to buzz;" cf. Du. bommen, Ger. bummen, word made by sound imitation.
Qariv "shout, clamour, cry;" sedâyi, → sonic.
Fr.: point sonique
The point where the → stellar wind makes a transition from → subsonic to → supersonic flow. In the particular case of a spherically symmetric wind (thus with no magnetic field), the distance from star, at which the sonic point occurs, is given by: rs = (GM*)/2cs2, where G is the → gravitational constant, M* is the stellar mass, and cs the → sound speed at the sonic point.
Describing a speed that is less than the speed of sound in the medium concerned. → supersonic.
Fr.: écoulement subsonique
A flow in which the velocity of the constituting particles never exceeds that of sound in the same fluid. Also called subcritical flow.
Fr.: écoulement transsonique
Flow of a fluid over a body with a speed in the range just above and below the → Mach number 1.
Fr.: physique des ultra-sons
The branch of physics dealing with elastic waves of frequencies above 20 kHz to 1010 kHz propagated in solids, liquids, and gases.