- difference frequency distortion
- A tone control system designed to compensate for frequency distortion in audio systems.
- Different frequency resolution in human hear.
- Two different frequency, and there is no resonance.
- The heterodyning principle is well known in nonlinear optics as difference frequency generation (DFG).
- The magnitude and phase of the composed balancing vector are adjusted by means of controlling difference frequency of current in inner stator windings.