WavePDEComponent
WavePDEComponent[vars, pars] yields a wave equation PDE term ∂²u/∂t² - c²∇²u with model variables vars and model parameters pars.
Examples
WavePDEComponent[{u[t, x, y], t, {x, y}}, {{"WaveSpeed" -> 1}}]Please visit the official Wolfram Language Reference for more details.