acoustic wave equation
hamugeš-e mowj-e sedâyi
Fr.: équation de l'onde acoustique
A → differential equation that describes the time evolution of the → scalar potential of the field φ. It is expressed by: ∇2φ = (1/c2)∂2φ/∂t2, where c is → velocity of → longitudinal waves and ∇2 is the → Laplacian operator.
Fr.: équation d'onde
The partial differential equation ∂2U / ∂2x + ∂2U / ∂2y + ∂2U / ∂2z = (1/c2) ∂2U / ∂2t or its counterparts in one or two dimensions or in other coordinates, the solution of which represents the propagation of displacementU as waves with velocity c.