The systematic effects of applied current amplitude to the magnetizing coil, distance between the poles of the electromagnetic yoke, magnetic excitation frequency, sensitivity and frequency response of magnetic Barkhausen noise (MBN) pickup coil, and the geometry of the test sample on the applied magnetic field strength, the tangential magnetic field strength, and the MBN signal profile are presented in this paper. The influence of different parameters is discussed with measurement results obtained from harder case-carburized steel and softer spheroidized annealed steel samples. This paper shows the importance of maximizing the shape of the MBN profile for an appropriate evaluation of ferritic steels.