The Analysis Of The Pitch Declination In Chinese Declarative Sentence

According to the analysis of previous studies,the pitch declination phenomenon usually exists in Chinese sentences,however there are not many researches on the performance of prosodic words.In this paper,the research data are all original natural language which come from the professional speech room.As the sentences of different prosodic words were taken as the research object,we extract the pitch parameters of the research data and divide the sentences into prosodic words,analyzes the top and bottom points,the slope and the tone range with the same time.For the sentences of different prosodic words,top points of sentences show a slowly increasing tendency,which is direct proportion.The relationship between bottom points and the increasing of prosodic words in sentences is not obvious.With the increasing of prosodic words,slope of top points and bottom points show a slowly decreasing tendency,the variation range of slope is larger,which is inverse proportion.In the statements which contain different prosodic words,the topline and the baseline both show the pitch declination phenomenon.And the downward trend have a certain relationship with the number of prosodic words in the sentences.With the increase of the number of prosodic words,top points and low points show a decreasing trend,and the two were inverse proportion relations.The more the prosodic words in the sentences,the numerical value of adjoining top point and bottom point will get more close to,the difference between the two will become smaller,the slopes of the topline and the baseline will become increasingly slow.With the sametime the maximum and minimum numerical values of the tone domain will become smaller.The shorter the sentence,the bigger the tone range of prosodic words;the longer the sentences,the smaller the tone range of prosodic words.In the sentence,with the inceasing of prosodic words,the change tendency of the tone domain is not obvious.