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An Approach to Measure Pronunciation Similarity in Second Language Learning Using Radial Basis Function Kernel

Christos Koniaris
University of Gothenburg, Centre for Language Technology, Department of Philosophy, Linguistics and Theory of Science, Dialogue Technology Lab, Gothenburg, Sweden

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Ingår i: Proceedings of the third workshop on NLP for computer-assisted language learning at SLTC 2014, Uppsala University

Linköping Electronic Conference Proceedings 107:6, s. 74–86

NEALT Proceedings Series 22:6, s. 74–86

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Publicerad: 2014-11-11

ISBN: 978-91-7519-175-1

ISSN: 1650-3686 (tryckt), 1650-3740 (online)

Abstract

This paper shows a method to diagnose potential mispronunciations in second language learning by studying the characteristics of the speech produced by a group of native speakers and the speech produced by various non-native groups of speakers from diverse language backgrounds. The method compares the native auditory perception and the non-native spectral representation on the phoneme level using similarity measures that are based on the radial basis function kernel. A list of ordered problematic phonemes is found for each non-native group of speakers and the results are analyzed based on a relevant linguistic survey found in the literature. The experimental results indicate an agreement with linguistic findings of up to 80.8% for vowels and 80.3% for consonants.

Nyckelord

pronunciation error detection; similarity measure; radial basis function kernel; phoneme; second language learning

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