期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2020
卷号：98
期号：16
页码：3270-3281
出版社：Journal of Theoretical and Applied
摘要：The paper presents the results of experimental studies directed to the speech intelligibility assessment while protecting it from leakage via acoustic channels by masking with combined acoustic signals, including “white” noise and speech-like signals. The speech information security assessment is closely related to environmental conditions, as a rule, the most common option is a certain room with various soundproofing properties of enclosing structural elements. It is possible to take into account the influence of soundproofing properties of building envelopes only on the basis of experimental measurements of the transfer characteristic of speech signals outside the premises and the additional protection space. It necessary to note that the results of the speech information security assessment also strongly depend on the methodology for conducting experimental studies. An important phenomenon in experimental studies is the resonance of the bending vibrations of the enclosing elements of the building structures. Difficulties in the speech information security assessment are caused by uncertainties associated with difficulties in the mathematical formulation of the protection problem on the one hand and a large number of factors affecting the speech information security, on the other hand. In the paper, it’s proposed to assess the speech information security by the determining of the speech intelligibility indicators in the limit states. For the correct assessment of the speech information security in terms of its intelligibility, a number of assumptions and limitations were adopted, which are based on practical experience and experimental studies of the speech information protection. The obtained results can be used to develop standards for the speech information protection from leakage via the acoustic channel.
