Analysis of experiments on the study of electrical activity in helium

From the experimental point of view, the works on the study of the so-called electrical activity in superfluid helium are analyzed. Based on the analysis of published data on the results of experiments on the appearance of such electrical activity under the propagation of second sound waves, during oscillations of a torsion oscillator filled with helium and microwave electromagnetic pumping of helium, one concludes that the experimental results published before 2016 do not give sufficient reasons to assume the presence of any special electrical activity of helium, and the appearance of an electric signal in a cell with superfluid helium at the propagation of acoustic waves in it can only be said after 2016. The nature of this signal needs further investigation.