The speed of sound in a gas is directly related to the compressibility of the gas. Compressibility is a measure of how easily a gas can be compressed or how its volume changes in response to changes in pressure. The compressibility factor (Z) is often used to characterize the compressibility of gases.
- a: Speed of sound in the gas (in m/s).
- ρ: Density of the gas (in kg/m³).
- τs: Isentropic compressibility of the gas.