Shimura Y, Yamanoucho I
Department of Education, Saitama University, Japan.
Acta Paediatr Jpn. 1992 Jun;34(3):259-66. doi: 10.1111/j.1442-200x.1992.tb00956.x.
The relationship between the vocalizations of early infants and their mothers was investigated by acoustic analysis. The subjects were eight infants aged 40-70 days and their mothers. The infants were sufficiently developed to utter pleasure vocalization. The acoustic characteristics of the voices of the infants and mothers while communicating with each other analyzed in terms of pitch, duration, latency and melody types. The results were as follows: 1) Correlation was significant between the average fundamental frequencies of the infants' voices and those of their mothers. Motherese and infants' vocalizations were similar in pitch. 2) There was little individual difference in the duration of infants' vocalizations, but a considerable individual difference in the duration of motherese. No correlation was observed in the duration of the vocalizations of the infants and mothers. 3) The latencies of infant vocalization and motherese showed large differences among the infant-mother pairs. There was a tendency for the latency of the motherese to affect the number of utterances by the infant. 4) Significant correlations in the melody types were observed in three mother-infant pairs. These findings indicate that there are significant correlations in the vocal exchanges between infants and their mothers.
通过声学分析研究了早期婴儿与其母亲发声之间的关系。研究对象为八名40至70天大的婴儿及其母亲。这些婴儿已发育到足以发出愉悦的声音。从音高、时长、延迟和旋律类型方面分析了婴儿与其母亲在相互交流时声音的声学特征。结果如下：1）婴儿声音的平均基频与其母亲的平均基频之间存在显著相关性。母亲语和婴儿发声在音高上相似。2）婴儿发声的时长个体差异较小，但母亲语的时长个体差异较大。未观察到婴儿和母亲发声时长之间的相关性。3）婴儿发声和母亲语的延迟在母婴对之间存在很大差异。母亲语的延迟有影响婴儿发声次数的趋势。4）在三对母婴中观察到旋律类型存在显著相关性。这些发现表明婴儿与其母亲之间的声音交流存在显著相关性。
