Research On Productive Characteristics And Intervention Of Emotional Prosody In Children With Cochlear Implant

The concept of emotional prosody comes from the emotional function of prosody,which refers to expressing the emotional state of the speaker by changing the pitch,speed(duration)and loudness of the speech.The correct expression of emotional prosody plays a vital role in speech communication.Some studies have pointed out that CI children have obvious defects in perceiving different emotional prosodies.In terms of language perception and production,they are two links that affect each other.In addition,there are few studies on the production of CI children’s emotional prosody in existing studies,and the training on the production of CI children’s emotional prosody in clinical rehabilitation is even rare.Therefore,research on the emotional prosody of CI children is urgently needed.Therefore,this study is mainly divided into two parts.The first study aims to compare the differences between children with cochlear implants and normal hearing children when they produce different types of emotional prosody through subjective auditory analysis and objective acoustic parameter analysis.The study is divided into two parts: One is to compare the subjective scores of normal hearing children and CI children when they produce different types of emotional prosody through subjective listening discrimination analysis.It was found that in simple imitation the subjective score of production of CI children’s emotional prosody is significantly lower than that of normal hearing children.From the subjective score results of different emotion types,the subjective scores of three emotional prosodies produced by CI children are ranked from high to low as follows:neutral> happy> sad.In the situational induction,and from different types of children,here were significant differences between the two kinds of children in the production of three different emotional prosodies.In terms of the results of the subjective scoring of different emotional prosody types,from high to low,the subjective scores of thethree children’s emotional prosody was: neutral> happy> sad.In summary,CI children’s control over producing emotional prosody is sad is weaker than producing emotional prosody is happy.Secondly,in terms of the experimental way of producing emotional prosody,simple imitation is easier for children than situation-induced.The second is to compare the differences in objective parameters when CI children and hearing children produce different emotional prosodies through the analysis of objective acoustic parameters.It was found that the objective acoustic parameters of the two types of children produced different types of emotional prosody is same in simple imitation and situational induction.And When the emotional prosody is happy,the fundamental frequency is the biggest,the intensity is the biggest,the duration is the shortest,and the speed is the fastest;When the emotional prosody is sad,the fundamental frequency is the smallest,the intensity is the smallest,the duration is the longest,and the speed is the slowest;when the emotional prosody is neutral,the parameters is between these two emotional prosodies.However,when CI children produce these three emotional prosodies,the difference in objective parameters between them is smaller than that of normal children.The parameters of emotional prosody of neutral sentences are similar to the parameters of emotional prosody of sad sentences,and the fundamental frequency of the emotional rhythm for sad sentence cannot drop.It shows that the ability of dropping the fundamental frequency when producing emotional sentences with sadness is lacking.Secondly,under the situation-induced experimental method,it was found that CI children don’t apply the strategy of speech rate to the production of different emotional prosodies like normal children.The second part is to formulate and validate the intervention strategy for CI children’s emotional prosody produce based on the research on the characteristics of emotional prosody produce of children with cochlear implants.The verification method of the intervention strategy adopts the A-B experiment design through a singlesubject experiment.It was found that the child ’s subjective scores of emotional prosody before and after the intervention showed a very significant difference,and the subjective scores after the intervention were significantly higher than before the intervention,and The monitoring indicators of the selected acoustic parameters(average fundamental frequency,average intensity,speech rate)have also changed.It shows that the formulated intervention strategy is effective.