Speed and volume velocity
When an acoustic wave travels through the air, the particles in the fluid oscillate around their rest position at a speed
. The volume velocity
measures the fluctuation of this speed trough a surface. Its unit is in cubic meters per second
. The volume velocity is also a scalar quantity.
Remarque : Remark
Be careful not to confuse speed
which corresponds to the vibration speed of the fluid particles, with the speed
of sound which corresponds to the travelling speed of sound waves.
