A physicist associated with the Barkhausen effect: the magnetization of a ferromagnet can change in discrete jumps even when the applied magnetic field varies smoothly. A pickup coil detects the accompanying changes in magnetic flux; amplification makes the irregular signal audible. The experiment connects a macroscopic noise measurement with sudden rearrangements of magnetic domains and the motion of domain walls.[ref]
The Barkhausen effect by Gianfranco Durin and Stefano Zapperi. Experimental methods, domain-wall interpretation and translation of Barkhausen’s original report
His work at Dresden also developed the experimental teaching of electrical engineering.[ref]Uni-Gebäude und ihre Namen: Barkhausen-Bau by Jörg Zaun. Heinrich Barkhausen section: founding of the Dresden institute and teaching
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Heinrich Barkhausen was a German physicist best known for his work in the field of electronics and magnetism. He is particularly recognized for the discovery of the Barkhausen effect, which is a phenomenon observed in ferromagnetic materials. The Barkhausen effect refers to the noise produced by the sudden changes in magnetization within a material as it is exposed to an external magnetic field, which manifests as audible sounds or measurable voltage spikes.