Buhr R D
J Speech Hear Res. 1980 Mar;23(1):73-94. doi: 10.1044/jshr.2301.73.
Recordings of vocal production of an infant (age 16-64 weeks) were subjected to perceptual and acoustic analysis. Sounds resembling the vowel sounds of English were identified, and formant frequency measurements were made from spectrograms. Significant longitudinal trends for individual vowel sounds were not apparent during this period, although formant relationships for some vowels after 38 weeks were consistent with the notion of restructuring of the infant's vocal tract. However, analysis of F1/F2 plots over time revealed the emergence of a well-developed vowel triangle, resembling that of older children and adults. The acute axis of this triangle seems to develop before the grave axis. Implications for anatomical, neuromuscular, and linguistic development are discussed.
对一名婴儿（16 - 64周龄）的发声进行了感知和声学分析。识别出了类似于英语元音的声音，并从频谱图中进行了共振峰频率测量。在此期间，单个元音的显著纵向趋势并不明显，尽管38周后一些元音的共振峰关系与婴儿声道重构的概念一致。然而，对F1/F2随时间变化的分析揭示了一个发育良好的元音三角形的出现，类似于大龄儿童和成人的元音三角形。这个三角形的锐角轴似乎比钝角轴先发育。文中讨论了其对解剖学、神经肌肉和语言发展的影响。
