The ratio of specific heat in air 14. R u r a r dr a du Eq. G the adiabatic constant characteristic of the specific gas.
The acoustic velocity can alternatively be expressed with Hooks Law as.
C 143000 0043. The formula for speed of sound is. In general the more rigid or less compressible the medium the faster the speed of sound. In an ideal gas see The Kinetic Theory of Gases the equation for the speed of sound is where is the adiabatic index R 831 Jmol K is the gas constant T K is the absolute temperature in kelvins and M is the molecular mass.