A method and device for signal detection is disclosed. A base sheet constituting a component of a hook part of a mechanical fastener is oriented to extend across the elastic members and attached to the outer sheet. The outstanding bits are parsed responsive to location marking, counting, and bit masking to provide insert bits. Thereafter, a mechanical abutment is provided as a third stage of jounce management. Because the rotor and stator units vibrate together rather than relative to each other, very small, precise tolerances are maintained between them. This is an adaptive sensitivity control determined by the size of the substrate.