The complete equations behind the theory of acoustic wave propagation are time dependent, as discussed in the Frequency Domain Study section. Solving time-domain equations is more complicated from a numerical point of view. They are necessary with studying systems where the time of flight is of importance, like in a flow-meter application. Short-term transient processes like step and impulse responses can benefit from modeling in the time domain, if not for efficiency so for convenience.

A dedicated Transient Solver Settings settings section exist at the physics level for all the transient acoustics interfaces where the Maximum frequency to resolve should be entered.