Strutt|Fundamentals|Speed of Sound calculates the wave velocity of sound in air as a function of temperature using the following ideal-gas equation:
`c_(ideal) = sqrt((gamma R T )/ M)`
where:
`gamma` = 1.4 is the adiabatic index
`R` = 8.3145 is the ideal gas constant
`M` = 0.029 is the molar mass of dry air
`T` is the air temperature (in Kelvin)