Fundamental Frequency Contour (Melody) of Infant Vocalizations across the First Year.

IF 1.1 4区 医学 Q3 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY
Tabea Kottmann, Maren Wanner, Kathleen Wermke
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Abstract

Introduction: The fundamental frequency contour (melody) of cry and non-cry utterances becomes more complex with age. However, there is a lack of longitudinal analyses of melody development during the first year of life.

Objective: The aim of the study was to longitudinally analyze melody development in typical vocalization types across the first 12 months of life. The aim was twofold: (1) to answer the question whether melody becomes more complex in all vocalization types with age and (2) to characterize complex patterns in more detail.

Methods: Repeatedly recorded vocalizations (n = 10,988) of 10 healthy infants (6 female) over their first year of life were analyzed using frequency spectrograms and fundamental frequency (f0) analyses (PRAAT). Melody complexity analysis was performed using specific in-lab software (CDAP, pw-project) in a final subset of 9,237 utterances that contained noise-free, undisturbed contours. Generalized mixed linear models were used to analyze age and vocalization type effects on melody complexity.

Results: The vocalization repertoire showed a higher proportion of complex melodies from the second month onward. The age effect was significant, but no difference was found in melody complexity between cry and non-cry vocalizations across the first 6 months. From month 7-12, there was a further significant increase in complex structures only in canonical babbling not in marginal babbling. Melody segmentations by laryngeal constrictions prevailed among complex shapes.

Conclusion: The study demonstrated the regularity of melody development in different vocalization types throughout the first year of life. In terms of prosodic features of infant sounds, melody contour is of primary importance, and further studies are required that also include infants at risk for language development.

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一岁婴儿发声的基本频率轮廓(旋律)。
随着年龄的增长,哭泣和非哭泣话语的基本频率轮廓(旋律)变得更加复杂。然而,缺乏对生命第一年旋律发展的纵向分析。目的:本研究的目的是纵向分析典型发声类型在生命最初12个月的旋律发展。目的有两个:(1)回答旋律是否随着年龄的增长在所有发声类型中变得更复杂的问题;(2)更详细地描述复杂的模式。方法:对10例健康婴儿(6例女婴)1周岁内重复记录的发声特征(n = 10988)进行频谱分析和基频分析(PRAAT)。使用特定的实验室软件(CDAP, pw-project)对包含无噪声,未受干扰轮廓的9,237个语音的最终子集进行旋律复杂性分析。采用广义混合线性模型分析年龄和发声类型对旋律复杂度的影响。结果:从第2个月开始,幼儿的发声曲目中复杂旋律的比例增加。年龄效应显著,但在前6个月,哭泣和非哭泣发声的旋律复杂性没有差异。从第7-12个月开始,只有在典型的咿呀学语中,复杂结构进一步显著增加,而不是在边缘咿呀学语中。在复杂的形状中,由喉部收缩引起的旋律分割占了上风。结论:本研究揭示了不同发声类型幼儿在出生后第一年旋律发展的规律性。就婴儿声音的韵律特征而言,旋律轮廓是最重要的,还需要进一步的研究,包括有语言发展风险的婴儿。
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来源期刊
Folia Phoniatrica et Logopaedica
Folia Phoniatrica et Logopaedica AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY-OTORHINOLARYNGOLOGY
CiteScore
2.30
自引率
10.00%
发文量
28
审稿时长
>12 weeks
期刊介绍: Published since 1947, ''Folia Phoniatrica et Logopaedica'' provides a forum for international research on the anatomy, physiology, and pathology of structures of the speech, language, and hearing mechanisms. Original papers published in this journal report new findings on basic function, assessment, management, and test development in communication sciences and disorders, as well as experiments designed to test specific theories of speech, language, and hearing function. Review papers of high quality are also welcomed.
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