Child-Directed Speech in Noise: Testing Signal- and Code-Based Phonetic Enhancement.
Purpose: Talkers adapt their speech according to the demands of their listeners and the communicative context, enhancing the properties of the signal (pitch, intensity) and/or properties of the code (enhancement of phonemic contrasts). This study asked how mothers adapt their child-directed speech (...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 67; no. 1; pp. 72 - 92 |
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| Autores principales: | , , , |
| Formato: | Artículo |
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American Speech-Language-Hearing Association
Jan2024
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=174704261&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 174704261 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: Jan2024 vid: 67 iid: 1 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 174704261 10.1044/2023_JSLHR-23-00033 ppf: 72 ppct: 20 formats: fmt: @attributes: type: P size: 1.9MB tig: atl: Child-Directed Speech in Noise: Testing Signal- and Code-Based Phonetic Enhancement. aug: au: Smith, Nicholas A. Hammans, Christine A. Vallier, Timothy J. McMurray, Bob affil: Department of Speech, Language and Hearing Sciences, University of Missouri–Columbia. Department of Psychological Sciences, University of Missouri–Columbia. Boys Town National Research Hospital, Omaha, NE. Department of Psychological and Brain Sciences, University of Iowa, Iowa City. Department of Communication Sciences and Disorders, University of Iowa, Iowa City. Department of Linguistics, University of Iowa, Iowa City. su: Caregivers Task performance Language acquisition Phonetics Communication Sound recordings Mother-child relationship Children Language disorder diagnosis Speech perception Vowels Experimental design Physiological aspects of speech Noise Intelligibility of speech Auditory perception Human voice Speech evaluation Research funding Descriptive statistics Video recording sug: subj: Caregivers Task performance Language acquisition Phonetics Communication Sound recordings Mother-child relationship Children Integrated Record Production/Distribution Sound recording merchant wholesalers Record Production Language disorder diagnosis Speech perception Vowels Experimental design Physiological aspects of speech Noise Intelligibility of speech Auditory perception Human voice Speech evaluation Research funding Descriptive statistics Video recording ab: Purpose: Talkers adapt their speech according to the demands of their listeners and the communicative context, enhancing the properties of the signal (pitch, intensity) and/or properties of the code (enhancement of phonemic contrasts). This study asked how mothers adapt their child-directed speech (CDS) in ways that might serve the immediate goals of increasing intelligibility, as well as longterm goals of supporting speech and language development in their children. Method: Mothers (N = 28) participated in a real-time interactive speech production/perception paradigm, in which mothers instructed their young (3- to 5-year-old) children, or an adult listener, to select the picture corresponding to a target word. The task was performed at low and high levels (56 vs. 75 dB SPL) of background noise to examine the Lombard effects of decreased audibility on speech production. Results: Acoustic–phonetic analyses of CDS and adult-directed speech (ADS) productions of target words and carrier phrase (e.g., “Find pig”) revealed that mothers significantly enhanced the mean pitch, pitch variability, and intensity of target words in CDS, particularly at higher background noise levels and for younger children. Mothers produce CDS with a higher signal-to-noise ratio than ADS. However, limited evidence was found for phonetic enhancement of the segmental properties of speech. Although increased category separation was found in the voice onset time of stop consonants, decreased vowel category separation (an anti-enhancement effect) was observed in CDS. Conclusions: Mothers readily enhance the suprasegmental signal properties of their speech in CDS, but not the acoustic–phonetic properties of phonemes. This study fails to provide evidence of phonetic enhancement in preschool children in a dyadic communication task under noisy listening conditions. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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