Before they get magnetized, magnetic particles are still and require a certain amount of initial energy to overcome inertia. Once moving they pretty much follow faithfully the magnetizing signal to saturation point.
All magnetic material who undergo the effects of the actions of a magnetic field react in accord with a modality which is described by a so-called Hysteresis Cycle.
The Multimedia Audio Course is also a textbook (available only in italian) entitled Learning sound technique (original title: Imparare la tecnica del suono)
