Comparisons of Speech Parameterisation Techniques for Classification of Intellectual Disability Using Machine Learning

• Published in: International journal of cognitive informatics & natural intelligence Vol. 14; no. 2; pp. 16 - 34
• Main Authors: Singh, Latika, Aggarwal, Gaurav
• Format: Journal Article
• Language: English
• Published: Hershey IGI Global 01.04.2020
• Subjects: Age; Algorithms; Analysis; Children with disabilities; Classification; Communication; Datasets; Disabled children; Discriminant analysis; Down syndrome; Economic analysis; Error analysis; Feature extraction; Informatics; Intellectual disabilities; Language; Linguistics; Machine learning; Methods; Neural networks; Open access publishing; Parameterization; Pattern recognition; Radial basis function; Speech; Speech recognition; Speech therapists; Support vector machines; India
• ISSN: 1557-3958; 1557-3966
• DOI: 10.4018/IJCINI.2020040102

Classification of intellectually disabled children through manual assessment of speech at an early age is inconsistent, subjective, time-consuming and prone to error. This study attempts to classify the children with intellectual disabilities using two speech feature extraction techniques: Linear Predictive Coding (LPC) based cepstral parameters, and Mel-frequency cepstral coefficients (MFCC). Four different classification models: k-nearest neighbour (k-NN), support vector machine (SVM), linear discriminant analysis (LDA) and radial basis function neural network (RBFNN) are employed for classification purposes. 48 speech samples of each group are taken for analysis, from subjects with a similar age and socio-economic background. The effect of the different frame length with the number of filterbanks in the MFCC and different frame length with the order in the LPC is also examined for better accuracy. The experimental outcomes show that the projected technique can be used to help speech pathologists in estimating intellectual disability at early ages.