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sound velocity

Sound propagates at a certain speed, the speed of sound. This depends on the medium in which it is transmitted and its temperature. The speed of sound is given in metres per second

(m/s). The fact that the speed of propagation differs in different media

and at different temperatures is causally related to the molecular motion that causes sound to propagate.

Speed of sound in different media

Speed of sound in different media

Airborne sound propagates from a sound source in a spherical form by compression and rarefaction of the air. The compression corresponds to an increased sound pressure

, the dilution to a decreased one. In air, the speed of sound at freezing point is 331 m/s relative to an air pressure at sea level.

Speed of sound and sound velocity at different air temperatures

Speed of sound and sound velocity at different air temperatures

At high minus temperatures, high humidity and in higher air layers it decreases, even below 300 m/s. In water the speed of sound is 1.4 km/s and in iron 5.1 km/s.

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Englisch: sound velocity
Updated at: 16.10.2019
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