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Formant Amplitude of Children with Down's Syndrome.
Peer reviewed Peer reviewed
Pentz, Arthur L., Jr. – American Journal of Mental Deficiency, 1987
The sustained vowel sounds of 14 noninstitutionalized 7- to 10-year-old children with Down's syndrome were analyzed acoustically for vowel formant amplitude levels. The subjects with Down's syndrome had formant amplitude intensity levels significantly lower than those of a similar group of speakers without Down's syndrome. (Author/DB)
Descriptors: Acoustics, Downs Syndrome, Voice Disorders, Vowels
Relation of Selected Acoustical Parameters and Perceptual Ratings to Voice Quality of Down Syndrome Children.
Peer reviewed Peer reviewed
Pentz, Arthur L., Jr.; Gilbert, Harvey R. – American Journal of Mental Deficiency, 1983
Analysis of the voice quality of 14 7- to 10-year-old Down's syndrome children revealed significantly greater frequency and amplitude perturbations and spectral noise-to-harmonic component ratios compared to ratings for nonretarded subjects. (Author/CL)
Descriptors: Downs Syndrome, Speech Handicaps, Voice Disorders
Acoustic and Perceptual Evaluation of Hypernasality of Mentally Retarded Persons.
Peer reviewed Peer reviewed
Hutchinson, John M.; Kline, Lorrie Scott – American Journal of Mental Deficiency, 1980
Results of perceptual and acoustic analyses revealed that 20 Down's syndrome young adults were significantly more hypernasal than were two other groups (20 idiopathic and 20 nonretarded Ss). (Author/CL)
Descriptors: Downs Syndrome, Drafting, Exceptional Child Research, Mental Retardation
Vocal Fundamental Frequency Characteristics of Institutionalized Down's Syndrome Children
Peer reviewed Peer reviewed
And Others; Montague, James C. – American Journal of Mental Deficiency, 1974
Descriptors: Downs Syndrome, Drafting, Exceptional Child Research, Institutionalized Persons