Motorniuk D. Assessment of an acoustic parameters of the room as a speech communication channel

The dissertation is devoted to the study of the influence of acoustic characteristics of the room, early and late sound reflections on the intelligibility of the speech signal, automation of evaluation of acoustic characteristics of the room, automation of articulation tests on the subjective intelligibility of speech. The research results allowed to create refined analytical and computer models of the influence of acoustic interference in the form of noise, early and late reflections of sound in the room on the quality of speech signals and speech intelligibility. Discovery of the negative effect of early sound reflections on speech intelligibility in the middle of the rooms allows to justify the need to take appropriate action to neutralize the discovered effect. The results presented in the dissertation can be used for examination and correction of room acoustic characteristics by calculating and measuring the quality and intelligibility of speech signals in the rooms that are designed, built or renovated. Having information on the nature and extent of noise, early sound reflections and late reverberation on the speech quality and intelligibility in different parts of rooms will increase the accuracy of acoustic examination. Automation of measurements of room acoustic characteristic, including speech quality and intelligibility, will increase the accuracy of measurements, while reducing the cost of material, time, financial and human resources.