Speed of sound

From Glossary of Meteorology

speed of sound

  1. (Also velocity of sound.) Usually taken to mean the phase speed of an acoustic (or sound) wave.

    In an ideal, stationary gas the speed of sound c is a thermodynamic property depending only on the equilibrium state of the gas and is given by
    where γ is the ratio of specific heat capacities, at constant pressure and volume, respectively; R is the gas constant; and T is absolute temperature.

  2. In seawater, a function of temperature, salinity, and pressure.