speed of sound

speed in which sound travels

This page is about the physical speed of sound waves in a medium. For other uses of the term and related terms, see Speed of sound (disambiguation). Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a given amount of time. In dry air, at a temperature of 21 °C (70 °F) the speed of sound is 344 m/s (1238 km/h, or 769 mph, or 1128 ft/s).Although the term is commonly used to refer specifically to air, the speed of sound can be measured in virtually any material. The speed of sound in liquids and solids is much higher than that in air.
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Speed of sound may refer to:Speed of sound, the physical constant that describes the speed of sound waves in a mediumSpeed of Sound (song), a single by Coldplay from their album X&YWings at the Speed of Sound, an album by Paul McCartney and WingsVelocity of Sound, an album by The Apples in Stereo
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The speed at which sound travels in a given medium under specified conditions. The speed of sound at sea level in the International Standard Atmosphere is 1108 ft/second, 658 knots, 1215 km/hour. See also hypersonic; speed; transonic. 1/11/68

Vitesse à laquelle le son se déplace dans un milieu donné et dans des conditions bien définies. La vitesse du son au niveau de la mer dans l'atmosphère international standard est de 1.108 pieds à la seconde, 658 noeuds ou 1.215 km à l'heure. Voir aussi hypersonique; transsonique; vitesse. 1/11/68

Synonyms and related words:
Mach, Mach number, Mach one, Mach two, air speed, escape velocity, ground speed, knots, shock wave, sonic barrier, sonic boom, sonic speed, sonics, sound barrier, subsonic speed, subsonics, supersonic speed, supersonics, ultrasonics