Micro-resonator

A micro-resonator was a tool used by Starfleet engineers to degauss relatively small devices. For larger objects, a magneton scanner could accomplish the same task.

In 2371, as part of a crash course in Starfleet training, Tuvok had Crewman Chell degauss the transporter pad with a micro-resonator to learn "patience". Tuvok estimated it would take approximately 26.3 hours to complete; Torres stated that the magneton scanner would take five minutes. 

Micro-résonateur