Subspace harmonic
In subspace physics, subspace harmonics described a series of oscillations.

According to the Engineering Systems Database, there was an association between subspace harmonics and the warp field generated by a Federation starship. These ships monitored harmonics with subspace harmonic monitors. (, display graphic)

Subspace harmonics were among the components of a warp signature. ()

A subspatial transkinetic analysis used an algorithm based on subspace harmonics. ()

de:Subraumharmonik
harmonic