频谱分析技术在腭裂语音研究中的应用  

Studies on Articulation of Children with Cleft Palate by Formants of Chinese Vowels

作　　者：封兴华[1] 魏建华[1] 张立军[1] 马威[1] 何亚会[1] 石冰[2] 

机构地区：[1]第四军医大学口腔医学院口腔颌面外科,陕西西安710032 [2]四川大学华西口腔医学院,四川成都610041

出　　处：《中国口腔颌面外科杂志》2003年第2期70-73,共4页China Journal of Oral and Maxillofacial Surgery

摘　　要：目的用语音共振峰的原理建立腭裂语音研究的客观方法。方法对正常儿童、腭裂术前儿童、腭裂术后儿童分别进行单元音[a]、[o]、[e]、[ī]、[u]、[ü]的录音及语音频谱分析,计算各组儿童的第一、二、三共振峰数值,对腭裂术后儿童的腭咽闭合不全率及语音清晰度进行测量,并评价其与共振峰的对应关系。结果正常儿童的第一、二、三共振峰数值是比较恒定的,腭裂术前儿童的共振峰数值明显下降,腭裂术后儿童的共振峰数值随腭咽闭合程度和语音清晰度的改善而显著提高。腭咽闭合完全者发[i]时,F3值明显大于腭咽闭合不全者。结论语音共振峰可以客观地反映腭咽闭合状况,单元音[i]可以作为此种检测的标准音素。Objective To establish a sound way evaluating the speech of cleft palate patients by vowel formants.Meth-ods The speech(Chinese vowel?????)of three group of children was recorded and the spectrum feature analyzed using Software Matlab5.3.The three groups of children were normal children,preoperative cleft palate children and postoperative children.The first three formants of every vowel in each group were calculated respectively.The rela-tionship among speech articulation,velopharyngeal function and formants were also assessed.Results The location of the first three vowel formants were steady in normal children.The frequency of the formants was significantly lower in the preoperative cleft palate children.While those postoperative children who had more clear speech more likely possessed higher formant frequency.The frequency of F3in those postoperative children whose VPI rate was less than10%when pronouncingwas higher than those VPI rate more than10%.Conclusion:The formants of vowels are sound index in assessing velopharyngeal function.It seems thatis the appropriate one in those vowels tested.

关 键 词：腭裂 元音 共振峰 腭咽闭合不全 语音 

分 类 号：R782[医药卫生—口腔医学]