Emitter matrix
The emitter matrix was a component of a disruptor. 

In 2374, Entharan arms dealer Kovin claimed he found a way to stabilize thoron-based disruptors by polarizing their emitter matrices. When Seven of Nine accused him of shooting her during this procedre, Kovin responded that he must have tuned the induction frequency too high, which knocked out Seven. ()

de: Emittermatrix
Technology