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Formula Speed of Sound in a Gas Temperature

Formula: Speed of Sound in a Gas

Speed of sound

The speed of sound in a gas (e.g. air) depends on the air temperature T [°C]. The speed of sound also depends on the propagation medium.
Medium at 20 °CSpeed of sound \(c_{\text s}\) in \( \mathrm{m}/\mathrm{s} \)
Gas: Air344
Gas: Helium981
Liquid: Benzene1326
Liquid: Water1484
Solid: Plexiglass2670
Solid: Iron5170
Speed of sound in different media.


Temperature of the gas (e.g. air) in degrees Celsius. The formula is considered a good approximation for temperatures between -20 °C and 40 °C.