Possibilities and outlooks of integral noise level decrease in voice information active protection means

Authors: Trushin V. A., Ivanov A. V.

Annotation: In the paper, the approaches to integral noise level decrease in voice information active protection means are reviewed. Results of the optimal noise spectrum choice are given. Some approaches to use of automated noise level adjustment method, which helps to decrease parasitic noise level and to prevent information leakage because of speech forcing effect, are described. Simple rules of generation of frequency bands switching noise are developed; efficiency of the method is experimentally proved. Approaches to generation of speech noise from syllables, words, and connected texts are investigated. Results of influence of speech on speech noise efficiency are obtained.

Keywords: voice information protection, parasitic noise, noise spectrum, frequency bands switching, speech noise