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Аннотация. В статье приведены технические и технологические особенности работы системы кохлеарной имплантации, которые оказывают влияние на разборчивость речи прооперированных пациентов. На основе анализа научных публикаций установлено, что принцип работы речевых процессоров разных производителей (Cochlear, Advanced Bionics, Oticon, Med-El) полностью совпадают, однако имеются различия в стратегиях кодирования получаемого сигнала из внешней среды. Установлено, что разборчивость речи пациентами с кохлеарными имплантами зависит от используемой стратегии кодирования-стимуляции и количества каналов стимуляции. Ключевые слова: кохлеарный имплант, стратегия выборки, аналоговая стимуляция, виртуальные каналы стимуляции. Annotation. The article presents the technical and technological features of the cochlear implantation system, which affect the speech intelligibility of the operated patients. Based on the analysis of scientific publications, it was found that the principle of operation of speech processors from different manufacturers (Cochlear, Advanced Bionics, Oticon, Med-El) completely coincide, but there are differences in the coding strategies of the received signal from the external environment. It has been established that speech intelligibility by patients with cochlear implants depends on the coding-stimulation strategy used and the number of stimulation channels.

The possibilities of the broadband tympanometry in audiological screening at newborns and at premature newborns with the different term of a gestation are studied. In view of the presence of age restrictions to application of the classical tympanometry at a frequency of probing tone of 226 Hz at children of the first year of life application of the broadband tympanometry is reasonable. Registration of the broadband tympanometry within audiological screening of newborns and children of the first year of life and also at premature newborns with different age of a gestation increases efficiency of diagnostics and allows to reduce amount of false positive results.

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Objectives to develop a safe and effective way of qualifying children for a second device cochlear implantation. Material and methods. There were 50 children from two to twelve years old after unilateral cochlear implantation under our observation. During qualification, the following criteria were taken into account: audiometry results, use of the hearing aid in the non-implanted ear and benefit of the device, speech and hearing development after the first cochlear implantation. Results. According to our findings the second cochlear implantation was recommended for 12 (24%) patients; in 16 (32%) cases the second cochlear implantation was refused; in 22 (44%) cases it was recommended to postpone implantation of the second device. Conclusion. Our results demonstrate that the safe and effective way of qualifying for a second cochlear implant can restore binaural hearing that is crucial for the child's speech and hearing development and enhance integration into a world of peers.