聽障兒童雙耳雙模式言語(yǔ)識(shí)別能力比較研究
[Abstract]:Two-ear and two-ear model is the hearing-aid model for hearing-impaired children after cochlear implantation in one ear and wearing hearing aids in the other ear. The advantages and influencing factors of binaural and bimodal speech recognition after speech recognition are discussed.
On the basis of reviewing the relevant studies on binaural and bimodal auditory abilities at home and abroad, the main body of this study is divided into four parts: the first part is a follow-up study on the development of binaural and bimodal auditory abilities; the second part is a comparative study on speech recognition ability under binaural and bimodal noise; the third part is a study on binaural and bimodal auditory orientation ability; the fourth part It is divided into two - mode two - event ERP. The specific methods and results are as follows:
In the first part, 149 subjects were divided into two groups according to different hearing aids, and the auditory ability and development trend of different hearing aids were compared. After 6 months of rehabilitation, the training of disyllabic words, short sentences and vowels recognition was mainly consolidation. The emphasis of intensive training should be on consonants, tone recognition and selective listening ability.
In the second part, 39 hearing-impaired children were further evaluated under different hearing-aid modes by using the closed-term and open-term tests from the perspective of speech recognition threshold under noise. The results showed that the speech recognition ability of hearing-impaired children under noise was significantly superior to that under unilateral cochlear implant. As for the influencing factors, the advantages of binaural and bimodal hearing aids will increase with the extension of wearing time. It is suggested to wear the binaural and bimodal hearing aids for more than 6 months to achieve the desired results. As long as the non-implanted ears have available low and medium frequency hearing, the binaural and bimodal hearing aids should be tested and matched. The better, the greater the advantages of binaural bimodal; preoperative hearing aid experience is conducive to postoperative binaural bimodal advantage; and with the increase of rehabilitation training time, binaural bimodal can gradually play a greater advantage.
The third part discusses the auditory Orienteering ability of 16 hearing-impaired children under different hearing aids. The results show that auditory Orienteering ability is a difficult point in their daily life. After using binaural and binaural mode, when the sound source is left and right, it shows a certain advantage. With the decrease of angle, the clues of binaural intensity difference and time difference weaken, and binaural and binaural intensity difference weakens. At the same time, putting the cochlear microphone in the wrong position will affect the auditory orientation ability, and the preoperative hearing aid experience may also affect the development of auditory orientation ability.
In the fourth part, the auditory evoked potentials of cochlear implant children and hearing-impaired children with different hearing aids were measured by event-related potentials test with balanced design paradigm, and the artifacts were corrected by independent component analysis (ICA). There was no significant difference in latency between the two groups, indicating that hearing impaired children reconstructed the auditory pathway by implanting cochlear implants and testing hearing aids, and the time when the auditory cortex received the sound signal was no different from that of healthy children. It is proved that there is a binaural bimodal advantage, and there is a moderate correlation between the difference of amplitude of P1 component in different hearing aids and the difference of speech recognition threshold in noisy environment. The automatic processing mechanism of tone discrimination has been developed.
The significance and innovations of this study are as follows: (1) To clarify the advantages and influencing factors of bimodal speech recognition in each dimension of Chinese-speaking hearing-impaired children after cochlear implantation, and to put forward relevant clinical suggestions for the rehabilitation training strategy and the choice of implanted ears by surgeons. (2) On the research method, the binaural and bimodal speech recognition abilities were tracked vertically and compared horizontally; macro-trend and micro-analysis were combined; subjective auditory behavior test and objective event-related potential test were combined to evaluate the binaural and bimodal speech recognition abilities. Secondly, speech sound stimulation was applied to the study of bimodal event-related potentials, and new paradigms and methods such as balance design and independent component analysis were explored to test cortical auditory evoked potentials in children with cochlear implants.
【學(xué)位授予單位】:華東師范大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2013
【分類號(hào)】:R764
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