Objective:This study aims to explore the influence of vowels and sound intensity on formant, so as to provide reference for the selection of sound samples and vocal methods in acoustic detection. Methods:Thirty-eight healthy subjects, 19 male and 19 female, aged 19-24 years old were recruited. The formants of different vowels（/a/, //, /i/ and /u/） and different sound intensities（lowest sound, comfort sound, highest true sound and highest falsetto sound） were analyzed, and pairings were compared between groups with significant differences. Results:①The vowels /a/ and // in the first formant were larger than /i/ and /u/, and /i/ was the largest in the second formant. The minimum value of the first formant is the lowest sound of /i/ and the maximum is the highest sound of /a/. ②In the first formant, the chest sound area increases with the increase of sound intensity, while the second formant enters the highest falsetto and decreases significantly. Conclusion:Different vowels and sound intensity have different distribution of formant, that is, vowel and sound intensity have different degree of influence on formant. According to the extreme value of the first formant, the maximum normal range is determined initially, which is helpful to improve the acoustic detection.
目的：本研究旨在探析元音与声强对共振峰的影响，为声学检测中声音样本和发声方式的选择提供参考。 方法：招募年龄为19~24岁健康受试者38例，男、女各19例。在不同元音（/a/、//、/i/和/u/）以及不同声强（最低音、舒适音、真声最高音和假声最高音）下的共振峰进行差异性分析，并对差异显著的组间进行两两比较。 结果：①在第一共振峰中元音/a/、//大于/i/和/u/，第二共振峰中/i/最大。第一共振峰的最小值是/i/的最低音，最大值是/a/的最高音。②第一共振峰中胸音区随着声强增加而增大，第二共振峰进入假声最高音明显下降。 结论：不同元音与声强共振峰分布各异，即元音和声强对共振峰产生不同程度的影响。根据第一共振峰的极值初步明确其最大正常范围，有助于完善声学检测。.
Keywords: formant detection; sound intensity; voice acoustic analysis; vowel.
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