Improving the methodology of spectral analysis of speech information in conditions of interference in order to assess its protection against leakage through technical channels

The relevance of this study is determined by increasing requirements for the protection of confidential information transmitted during negotiations in designated premises. With the increasing number of technical means for unauthorized collection of acoustic information, there is a need to improve the methods for assessing its protection, ensuring a more accurate prediction of possible leakage channels and the quality of information interception. The separation of parameters by gender, based on the modified formant method, proposed in this paper, allows us to eliminate one of the key drawbacks of existing scientific approaches to solving this problem - the use of averaged speech characteristics that do not reflect the real diversity of speech signals. In the course of the study, the methodology for spectral analysis of speech information in interference conditions was improved; a modified version of the formant method for assessing speech intelligibility was implemented, taking into account the variability of speech characteristics in different groups of speakers; specialized software for the automated analysis of acoustic speech information with the ability to classify parameters by the gender of the speaker was developed; the results of experimental studies based on the improved methodology for spectral analysis of speech information in interference conditions for processing speech samples to obtain statistically significant data are presented. The results of the study can be used in the design of systems for protecting speech information from leakage through technical channels.

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