According to example configurations, a speech-processing system parses an uttered sentence into segments. The current flowing through the two devices is responsive to input signals provided to either or both of the devices. A planar structure on the same wafer is coupled to a voltage source and a current profile is recorded. A pre-distortion unit applies a distortion compensation processing to the transmission signal by using the distortion compensation coefficient. In some embodiments a top panel is welded to two side panels to form two top corners of the beam and a bottom panel is welded to the two side panels to form two bottom corners of the beam. Subsequent filter settings and filtering operations can be based on characteristics of previous relevant results in an iterative and dynamic manner.