Computer aided instruction Gaussian Mixture Model Communication channels (information theory) Computational linguistics Computer assisted language learning Computer-Aided Language Learning Computer-aided language learning Computer-assisted language learning Consumer products E-learning English word Feature extraction Gaussian Mixture Models Gaussian mixture models Language learning Learning systems Lexical stress detection Linguistics Mel frequency cepstral co-efficient Mel frequency cepstral coefficients Non-native Object recognition Probability Prosodic features Signal processing Spectral feature Spectral tilt Speech recognition Stress classification Stress classifications