The purpose of the current study was to revisit a controversial topic: whether frequencies of phonological consonant and vowel classes differ in speech directed to children and to adults. In addition, the current study investigated whether the frequency of phonological consonant and vowel classes changes with children’s increasing chronological and/or developmental age. This study analyzed speech input from 44 adults to four different age groups of listeners (i.e., three groups of children at 6, 18, and 36 months of age and one group of adult listeners) in terms of frequency of occurrence of consonant and vowel classes. Results revealed that consonant stop, nasal, fricative and glide manner classes as well as all four consonant place classes were significantly different in speech directed to the four different age groups. A perspective is discussed to better understand the nature of frequency input of phonological sound classes.

当前研究的目的是重新审视一个有争议的话题：针对儿童和成人的语音中，语音辅音和元音类别的频率是否不同。此外，当前的研究还调查了语音辅音和元音类别的频率是否随着儿童的实际年龄和/或发育年龄的增加而变化。本研究根据辅音和元音类别的出现频率，分析了 44 名成人向四个不同年龄组的听众（即三组 6、18 和 36 个月大的儿童和一组成人听众）的语音输入。 。结果显示，针对四个不同年龄组的言语，辅音塞音、鼻音、摩擦音和滑音类别以及所有四个辅音位置类别均存在显着差异。讨论了一个观点，以更好地理解音系声音类别的频率输入的本质。