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Sonic speed
A B C D E F H I M N O P R S T U W
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Sonic speed

Sonic speed (or: speed of sound) cs is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. The propagation speed depends heavily on the type, temperature and density of the medium. In dry air at 20°C (68°F) and 1 bar air pressure, the speed of sound is 343.2 m/s (1,126 ft/s).