正常成年男性/a/、/i/、//与/n/、/?/协同发音时元音鼻流量的研究

Nasal Flow of /a/,/i/,// and /n/,/?/ Coarticulation for Male Adults

目的探讨正常成年男性/a/、/i/、//与/n/、/ /协同发音时元音鼻流量的特点。方法 32例正常成年男性（年龄18～30岁,平均22.5±2.5岁）分别以阴平声调发以下音节[//内为国际音标,（）内为拼音]：/an/（an）、/in/（in）、/n/（en）、/a/（ang）、/i/（ing）、//（eng）、/a/（a）、/i/（i）、//（e）3次,比较发元音（vowel,V）与辅音（consonant,C）组合音节（VC音节）及单发元音时的元音鼻流量的大小。结果发/an/、/in/、/n/、/a/、//、/i/时元音的鼻流量均大于单发元音的鼻流量;当单发元音时,/i/的鼻流量大于/a/、//;当后接鼻韵尾/n/、//时,/i/的鼻流量〉//的鼻流量〉/a/的鼻流量。结论元音和辅音组合（VC音节）结构中前接元音会受鼻韵尾/n/、//的逆向同化影响,且/n/对前接元音的鼻化程度大于//;在鼻韵尾的影响下,元音鼻化的程度主要取决于舌位的高低;鼻化元音的鼻流量可作为前后鼻音的有效监测指标。

Objective To investigate acoustic characteristics of VC coarticulation for males in Mandarin. Methods This study compared nasal flow of 32 male adults＇ production which include/an/,/in/,/an/,/ /,/i /, / /,/a/,/i/,/ /. Results Whether/a/, /i/ or/ /, the nasal flow of vowels before/n/ was greater than the nasal flow of vowels before/ /was greater than the nasal flow of vowels themselves. When produced solely, the nasal flow of/i/was greater than the nasal flow of/a/, / /. Before nasal consonants/n/, / / , the nasal flow of/i/ was greater than the nasal flow of/ /which was greater than the nasal flow of/a/. Conclusion Vowels before nasal consonants can be nasalized. The nasalization of/n/ to vowel is greater than that of / / to vowel. When nasals is produced around, the nasalization of vowel depends on the height of the tongue. The nasal flow of vowels can be used as an effective measure and monitor the indicators before and after nasal coarticulatin.