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Comparison of feature evaluation criteria for speech recognition based on electromyography

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Abstract

In this paper, we present a performance comparison of 14 feature evaluation criteria and 4 classifiers for isolated Thai word classification based on electromyography signals (EMG) to find a near-optimal criterion and classifier. Ten subjects spoke 11 Thai number words in both audible and silent modes while the EMG signal from five positions of the facial and neck muscles were captured. After signal collection and preprocessing, 22 EMG features widely used in the EMG recognition field were computed and were then evaluated based on 14 evaluation criteria including both independent criteria (IC) and dependent criteria (DC) for feature evaluation and selection. Subsequently, the top nine features were selected for each criterion, and were used as inputs to classifiers. Four types of classifier were employed with 10-fold cross-validation to estimate classification performance. The results showed that features selected with a DC on a Fisher’s least square linear discriminant classifier (D_FLDA) used with a linear Bayes normal classifier (LBN) gave the best average accuracies, of 93.25 and 80.12% in the audible and the silent modes, respectively.

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Acknowledgements

We would like to thank the Research and Development Office (RDO), Prince of Songkla University; Associate Professor Seppo Karrila, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus; and Mr. Michal Currie for commenting on the manuscript.

Funding

This work was supported in part by the Thailand Research Fund (TRF) through the Royal Golden Jubilee Ph.D. Program (Grant No. PHD/0164/2552).

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Authors and Affiliations

  1. Department of Electrical Engineering, Faculty of Engineering, Prince of Songkla University, 15 Kanjanavanich Road, Kho Hong, Hat Yai, Songkhla, 90112, Thailand

    Niyawadee Srisuwan, Pornchai Phukpattaranont & Chusak Limsakul

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  1. Niyawadee Srisuwan
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  2. Pornchai Phukpattaranont
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  3. Chusak Limsakul
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Correspondence to Niyawadee Srisuwan.

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Srisuwan, N., Phukpattaranont, P. & Limsakul, C. Comparison of feature evaluation criteria for speech recognition based on electromyography. Med Biol Eng Comput 56, 1041–1051 (2018). https://doi.org/10.1007/s11517-017-1723-x

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