Source mapping analysis, a multi-source method for the interpretation and analysis of magnetic Barkhausen noise signals

This work proposes a method to study multiple sources in the magnetic Barkhausen noise signal. The method is termed source mapping analysis and is based on the generation of a map of signals using a set of elementary sources. The evolution of Barkhausen noise signals as a function of two microstructural features, i.e. carbon content and level of plastic deformation, is studied by placing the input signal on the map. The position of the magnetic Barkhausen noise signal in the map follows a trajectory depending on these microstructural features, which could be used to simultaneously estimate their values.