Vocalizations of one-year-olds

Kent, Ray D.; Bauer, Harold R.

doi:10.1017/s0305000900006620

Cited by 171 publications

(127 citation statements)

References 33 publications

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“…Studies by Mitchell and Kent (1990) on 7-11 month old infants and Kent and Bauer (1985) on 13-month old infants confirm the predominance of vowels at these ages. Because vowels are produced for such a long period, they may be overlooked--especially when the focus of an assessment is on emergence of new vocalization types, such as babbling.…”

Section: Discussionmentioning

confidence: 73%

Assessing vocal development in infants and toddlers

Nathani¹,

Ertmer²,

Stark³

2006

Clinical Linguistics & Phonetics

205

219

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The purpose of this study was to examine changes in prelinguistic vocal productions during the first 20 months of life. Vocalizations were classified into 23 mutually exclusive and exhaustive types, and grouped into five ascending levels using the Stark Assessment of Early Vocal Development-Revised (SAEVD-R). Data from 30 typically developing infants, aged 0-20 months, show that older infants attained higher developmental levels on the SAEVD-R than younger infants. Infants 0-2, 3-5, and 6-8 months of age primarily produced vocalizations from Levels 1 (Reflexive), 2 (Control of Phonation), and 3 (Expansion). Infants 9-20 months of age also produced vocalizations from Level 4 (Basic Canonical Syllables). Only infants from 16-20 months of age produced Level 5 (Advanced Forms) vocalizations in significant quantities. The outcomes indicate that the SAEVD-R is a valuable instrument for evaluating prelinguistic vocal development.

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Section: Discussionmentioning

confidence: 73%

Assessing vocal development in infants and toddlers

Nathani¹,

Ertmer²,

Stark³

2006

Clinical Linguistics & Phonetics

205

219

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“…In addition, other aspects of canonical syllables have been explored. For example, Kent and Bauer (1985) studied the most frequent syllable shapes and vocalization types used by infants during this period. Syllable shapes describe the combination of consonants (C) and vowels (V) that make up the syllable.…”

mentioning

confidence: 99%

“…Canonical babbling is often delayed in infants with hearing loss compared with hearing infants (Eilers & Oller, 1994;Oller & Eilers, 1988). Hearing infants produce more monosyllabic sequences than diand polysyllabic sequences and show preferences for CV and CVC syllable shapes during the canonical babbling period (Davis & MacNeilage, 1995;Kent & Bauer, 1985). However, no empirical studies have explored the use of syllable shape, percentage of canonical syllables in an utterance, and consonant onset in canonical CV syllables in early-identified infants with hearing loss.…”

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confidence: 99%

Auditory Sensitivity and the Prelinguistic Vocalizations of Early-Amplified Infants

Hapsburg

Davis

2006

J Speech Lang Hear Res

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Purpose: Vocalization development has not been studied thoroughly in infants with early-identified hearing loss who receive hearing aids in the 1 st year of life. This study sought to evaluate the relationship between auditory sensitivity and prelinguistic vocalization patterns in infants during the babbling stage. Method: Spontaneous vocalizations of 15 early-identified infants with varying degrees of hearing sensitivity, from normal to profound hearing loss, were audiotaped and perceptually transcribed. Associations between the infant's unaided pure-tone average and the following vocalizations were explored: canonical babbling ratio, percentage of utterances containing canonical syllables, canonical syllable shapes, number of syllable sequences, and consonant-onset patterns in canonical syllables. Results: Hearing sensitivity was significantly associated with the percentage of utterances containing canonical syllables, the vocalization types used in utterances, and canonical syllable shapes used by the infants. Conclusions: Auditory sensitivity contributes significantly to the emergence of babbling patterns. In addition, there is a need for continued study of the vocalizations of infants with milder forms of hearing loss, because in this study, their vocalizations were highly variable despite having received early amplification.

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“…Another category is growl, which includes utterances with low pitch, harshness, creaky voice, and/or pulse register ͑Buder et al, 2008͒. Perhaps the most frequently occurring protophone is the vocant, which refers to vowel-like utterances ͑Martin, 1981; Kent and Bauer, 1985͒. Vocants have intermediate pitch and relatively normal phonation.…”

Section: Prelinguistic Phonological Categoriesmentioning

confidence: 99%

Data-driven automated acoustic analysis of human infant vocalizations using neural network tools

Warlaumont

Oller

Buder

et al. 2010

The Journal of the Acoustical Society of America

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Acoustic analysis of infant vocalizations has typically employed traditional acoustic measures drawn from adult speech acoustics, such as f 0 , duration, formant frequencies, amplitude, and pitch perturbation. Here an alternative and complementary method is proposed in which data-derived spectrographic features are central. 1-s-long spectrograms of vocalizations produced by six infants recorded longitudinally between ages 3 and 11 months are analyzed using a neural network consisting of a self-organizing map and a single-layer perceptron. The self-organizing map acquires a set of holistic, data-derived spectrographic receptive fields. The single-layer perceptron receives self-organizing map activations as input and is trained to classify utterances into prelinguistic phonatory categories ͑squeal, vocant, or growl͒, identify the ages at which they were produced, and identify the individuals who produced them. Classification performance was significantly better than chance for all three classification tasks. Performance is compared to another popular architecture, the fully supervised multilayer perceptron. In addition, the network's weights and patterns of activation are explored from several angles, for example, through traditional acoustic measurements of the network's receptive fields. Results support the use of this and related tools for deriving holistic acoustic features directly from infant vocalization data and for the automatic classification of infant vocalizations.

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Vocalizations of one-year-olds

Cited by 171 publications

References 33 publications

Assessing vocal development in infants and toddlers

Assessing vocal development in infants and toddlers

Auditory Sensitivity and the Prelinguistic Vocalizations of Early-Amplified Infants

Data-driven automated acoustic analysis of human infant vocalizations using neural network tools

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