horn equation

horn equation

[′hȯrn i‚kwā·zhən]
(acoustics)
A second-order partial differential equation for the velocity potential as a function of time and of distance along an acoustic horn.
References in periodicals archive ?
The E- and H-plane sectorial horn equations|3~ were then used to calculate an upper error limit to the approximation of using the waveguide equation in place of the nonexistent pyramidal horn equation.