Speed of Sound
Depends on the elastic and inertial properties of the particular medium. It also depends on the temperature of the medium. In air, the speed of sound at 20°C is 343ms-1.
- For liquids, the speed of sound is much higher than it is for gases because the density increase for a given pressure increase is much smaller in liquids than in gases. For a pure substance near its critical temperature and pressure, however, the sound speeds of the vapour and liquid phases are not very different.
- NPL: Kaye and Laby The speed and attenuation of sound.