Sound energy flux
From Free net encyclopedia
The sound energy flux q is the average rate of flow of sound energy for one period through any specified area.
In a medium of density ρ for a plane or spherical free wave having a velocity of propagation v, the sound energy flux through the area A corresponding to an effective sound pressure p is
- J = (p2A / ρ v) cos θ
where θ = the angle between the direction of propagation of the sound and the normal to the area A.