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speed of sound

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speed of sound

distance travelled during a unit of time by a sound wave propagating through an elastic medium

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About speed of sound

The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound is how fast vibrations travel. At 20 °C (68 °F), the speed of sound in air is about 343 m/s, or 1 km in 2.92 s or one mile in 4.69 s. It depends strongly on temperature as well as the medium through which a sound wave is propagating. At 0 °C (32 °F), the speed of sound in dry air is about 331 m/s. The speed of sound in an ideal gas depends only on its temperature and composition. The speed has a weak dependence on frequency and pressure in dry air, deviating slightly from ideal behavior.

Facts from Wikidata (CC0). Image by Ensign John Gay, U.S. Navy via Wikimedia Commons (Public domain).

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