Impact of eddy currents on Barkhausen and magnetoacoustic emission intensity in a steel plate magnetized by a C-core electromagnet

Abstract The paper analyzes the impact of frequency on magnetoacoustic emission (MAE) and Barkhausen effect (BE) signals in terms of the time and spatial distribution of magnetic induction inside the magnetized plate. Phase relationships between the signals are examined experimentally and with ANSYS software. The time-spatial distribution of magnetic induction induced by eddy currents inside the plate accounts for a shift of the Barkhausen signal relative to the MAE signal.