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Full-Text Articles in Special Education and Teaching
Algorithmic Estimation Of Pauses In Extended Speech Samples Of Dysarthric And Typical Speech, Jordan R. Green, David R. Beukelman, Laura J. Ball
Algorithmic Estimation Of Pauses In Extended Speech Samples Of Dysarthric And Typical Speech, Jordan R. Green, David R. Beukelman, Laura J. Ball
Department of Special Education and Communication Disorders: Faculty Publications
The aim of this study was to evaluate the validity and performance of an algorithm designed to automatically extract pauses and speech timing information from connected speech samples. Speech samples were obtained from 10 people with amyotrophic lateral sclerosis (ALS) and 10 control speakers. Pauses were identified manually and algorithmically from digitally recorded recitations of a speech passage that was developed to improve the precision of pause boundary detection. The manual and algorithmic methods did not yield significantly different results. A stepwise analysis of three different pause detection parameters revealed that estimates of percent pause time were highly dependent on …
Diagnostic Assessment Of Childhood Apraxia Of Speech Using Automatic Speech Recognition (Asr) Methods, John-Paul Hosom, Lawrence Shriberg, Jordan R. Green
Diagnostic Assessment Of Childhood Apraxia Of Speech Using Automatic Speech Recognition (Asr) Methods, John-Paul Hosom, Lawrence Shriberg, Jordan R. Green
Department of Special Education and Communication Disorders: Faculty Publications
We report findings from two feasibility studies using automatic speech recognition (ASR) methods in childhood speech sound disorders. The studies evaluated and implemented the automation of two recently proposed diagnostic markers for suspected Apraxia of Speech (AOS) termed the Lexical Stress Ratio (LSR) and the Coefficient of Variation Ratio (CVR). The LSR is a weighted composite of amplitude area, frequency area , and duration in the stressed compared to the unstressed vowel as obtained from a speaker’s productions of eight trochaic word forms. Composite weightings for the three stress parameters were determined from a principal components analysis. The CVR expresses …
Time Series Analysis Of Jaw Muscle Contraction And Tissue Deformation During Mastication In Miniature Pigs, Z. J. Liu, Jordan R. Green, C. A. Moore, S. W. Herring
Time Series Analysis Of Jaw Muscle Contraction And Tissue Deformation During Mastication In Miniature Pigs, Z. J. Liu, Jordan R. Green, C. A. Moore, S. W. Herring
Department of Special Education and Communication Disorders: Faculty Publications
Masticatory muscle contraction causes both jaw movement and tissue deformation during function. Natural chewing data from 25 adult miniature pigs were studied by means of time series analysis. The data set included simultaneous recordings of electromyography (EMG) from bilateral masseter (MA), zygomaticomandibularis (ZM) and lateral pterygoid muscles, bone surface strains from the left squamosal bone (SQ), condylar neck (CD) and mandibular corpus (MD), and linear deformation of the capsule of the jaw joint measured bilaterally using differential variable reluctance transducers. Pairwise comparisons were examined by calculating the cross-correlation functions. Jaw-adductor muscle activity of MA and ZM was found to be …