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Multitaper perceptual linear prediction features of voice samples to discriminate healthy persons from early stage Parkinson diseased persons

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Abstract

The performance of multitaper perceptual linear prediction (PLP) features of speech samples to discriminate healthy and early stage Parkinson diseased subjects is investigated in this paper. The PLP features are conventionally obtained by computing the power spectrum using a single tapered Hamming window. This estimated spectrum exhibits large variance which can be reduced by computing the weighted average of power spectra obtained using a set of tapered windows, leading to multitaper spectral estimation. In this investigation, two multitaper techniques namely Sine wave taper and Thomson multitaper along with the conventional single taper windowing are investigated. Artificial Neural network is then used to classify the PLP features extracted by applying the three types of window tapers on the speech signals of healthy and early stage Parkinson affected people and their respective performances are compared. The results show more accuracy using the multitaper techniques when compared with the conventional single taper technique. It is seen that the accuracy obtained using Sine wave tapers as well as Thomson multitaper is maximum for five tapers. An improvement in the recognition accuracy by 7.5% using the Sine tapers and by 6.9% using the Thomson tapers is obtained when compared with the conventional method. An improvement in other performance measures like Equal error rate, False positive rate, False negative rate, Sensitivity and Specificity is also observed in the multitaper techniques.

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Acknowledgements

We would sincerely like to thank the Parkinson Disease Movement Disorder Society (PDMDS) of India for allowing us to collect speech samples of participants from various PDMDS centers.

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Authors and Affiliations

  1. Electrical Engineering Department, Veermata Jijabai Technological Institute, Matunga, Mumbai, Maharashtra, 400019, India

    Savitha S. Upadhya & A. N. Cheeran

  2. Electronics Engineering Department, K J Somaiya College of Engineering, Vidyavihar, Mumbai, Maharashtra, 400077, India

    J. H. Nirmal

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  1. Savitha S. Upadhya
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  2. A. N. Cheeran
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  3. J. H. Nirmal
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Correspondence to Savitha S. Upadhya.

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Upadhya, S.S., Cheeran, A.N. & Nirmal, J.H. Multitaper perceptual linear prediction features of voice samples to discriminate healthy persons from early stage Parkinson diseased persons. Int J Speech Technol 21, 391–399 (2018). https://doi.org/10.1007/s10772-017-9473-6

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  • DOI: https://doi.org/10.1007/s10772-017-9473-6

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