[en] A brief review is given of the theory predicting that the instantaneous voltage generated by single-quantum vortices or multiquanta flux tubes moving through a superconducting specimen depends upon both the specimen shape and the spatial configuration of the measuring circuit. This theory is then applied to obtain the voltage pulses expected from two different measuring circuits attached to a superconducting strip. The time-dependent voltage is predicted to be proportional not only to the vortex or flux-tube velocity but also to a geometry-dependent function of the position of the vortex or flux tube relative to the measuring circuit