The velocity of a sound wave is the speed at which the sound wave travels through a medium. It is measured in meters per second (m/s). The velocity of a sound wave depends on the properties of the medium through which it is traveling. In general, the denser the medium, the slower the velocity of sound. For example, the velocity of sound in air is approximately 343 m/s, while the velocity of sound in water is approximately 1,482 m/s.

The velocity of a sound wave can also be affected by the temperature of the medium. In general, the higher the temperature, the faster the velocity of sound. For example, the velocity of sound in air increases by approximately 0.6 m/s for every degree Celsius increase in temperature.

The velocity of a sound wave is an important factor in many applications, such as acoustics, sonar, and seismology.