ERIC Number: EJ1162262
Record Type: Journal
Publication Date: 2017-Nov
Abstractor: As Provided
Acoustics of Clear and Noise-Adapted Speech in Children, Young, and Older Adults
Smiljanic, Rajka; Gilbert, Rachael C.
Journal of Speech, Language, and Hearing Research, v60 n11 p3081-3096 Nov 2017
Purpose: This study investigated acoustic-phonetic modifications produced in noise-adapted speech (NAS) and clear speech (CS) by children, young adults, and older adults. Method: Ten children (11-13 years of age), 10 young adults (18-29 years of age), and 10 older adults (60-84 years of age) read sentences in conversational and clear speaking style in quiet and in noise. A number of acoustic measurements were obtained. Results: NAS and CS were characterized by a decrease in speaking rate and an increase in 1-3 kHz energy, sound pressure level (SPL), vowel space area (VSA), and harmonics-to-noise ratio. NAS increased fundamental frequency (F0) mean and decreased jitter and shimmer. CS increased frequency and duration of pauses. Older adults produced the slowest speaking rate, longest pauses, and smallest increase in F0 mean, 1-3 kHz energy, and SPL when speaking clearly. They produced the smallest increases in VSA in NAS and CS. Children slowed down less, increased the VSA least, increased harmonics-to-noise ratio, and decreased jitter and shimmer most in CS. Children increased mean F0 and F1 most in noise. Conclusions: Findings have implications for a model of speech production in healthy speakers as well as the potential to aid in clinical decision making for individuals with speech disorders, particularly dysarthria.
Descriptors: Acoustics, Phonetics, Young Adults, Older Adults, Preadolescents, Early Adolescents, Speech Communication, Vowels, Sentences, Reading, Measures (Individuals), Age Differences
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A
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