V.I. Mirgorodsky1, V.V. Gerasimov2, A.V. Gerus3, V.V. Dementienko4, E.M. Korablev5

1–3,5 Fryazino Branch, Kotelnikov Institute of Radio Engineering and Electronics
Russian Academy of Sciences (FIRE RAS) (Fryazino, Moscow Region, Russia)

2 Institute of Radioengineering and Electronics, Russian Academy of Sciences (IRE RAS) (Moscow, Russia)

The development of the element base of electronics leads to the emergence of new opportunities for studying biological objects. This work is devoted to demonstrating the capabilities of highly sensitive and broadband receivers of acoustic emission from the human body. The use of such receivers should allow the development of new methods for diagnosing human physiological parameters.

The work is devoted to the presentation of the results of registration of acoustic emission signals from the temporal regions of the head of the subjects simultaneously with the registration of signals of electro dermal activity, from the leads on the fingers of the subjects. During the experiments, highly sensitive acoustic sensors with a wide band of recorded frequencies from 10 Hz to 100 kHz were placed on the temporal areas of the head, and electrodes were placed on the fingers of the subjects for recording electro dermal activity. To ensure a sufficient rate of manifestation of the signals of the electro dermal reaction in the field of view of the subjects during the experiment, a monitor was placed on which feature video films were shown. It was found that in the process of watching video films by the subjects, signals of electro dermal activity are observed, the moments that corresponded to the sharp plot points of the films, which is, in principle, a well-known phenomenon when the subjects perceive information that is significant to them. However, an analysis of the simultaneously recorded acoustic emission showed that, as a rule, acoustic emission peaks of significant magnitude are observed before the signals of electro dermal activity. An analysis of the parameters of the observed acoustic emission peaks showed that they are similar in time parameters and spectral properties to the noise accompanying human breathing and are, in fact, deeper than usual (forced) inhalations and exhalations. Thus, it has been experimentally shown that in the process of perceiving information (in this case, a video film) at critical moments of the plot, when the subjects perceive information that is significant for them, the subjects involuntarily take more than usual deep (forced) breaths followed by more intense exhalations, which lead to after 2 - 5 seconds to the excitation of signals of electro dermal activity. This phenomenon demonstrates the fruitfulness of using the temporal leads for recording acoustic signals associated with the breathing of the subjects. In particular, as shown in the work, in this way it is possible to determine the time delays of the signals of electro dermal activity in relation to the peaks of acoustic emission, indicating the perception by the subjects of information that is significant for them, which can be useful for studying the features of the physiology of the subjects.

Mirgorodsky V.I., Gerasimov V.V., Gerus A.V., Dementienko V.V., Korablev E.M. Correlation between electrodermal activity and acoustic emission from the temporal regions of the human head. Biomedicine Radioengineering. 2022. V. 25. № 6. Р. 18-24. DOI: https://doi.org/10.18127/j15604136-202206-02 (In Russian)

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