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Systems and Methods for an Automated Pronunciation Assessment System for Similar Vowel Pairs

Author(s):
Evanini, Keelan
Patent Issued:
Nov 08, 2016
Patent Number:
9,489,864
Source:
ETS Patent
Document Type:
Patent
Family ID:
51061670
Subject/Key Words:
Patent, Active Patent, Pronunciation, Non-Native Speakers, Automated Scoring of Speech, Automatic Speech Recognition, Automated Scoring and Natural Language Processing, Vowel Quality

Abstract

Computer-implemented systems and methods are provided for assessing non-native speech proficiency. A non-native speech sample is processed to identify a plurality of vowel sound boundaries in the non-native speech sample. Portions of the non-native speech sample are analyzed within the vowel sound boundaries to extract vowel characteristics associated with a first vowel sound and a second vowel sound represented in the non-native speech sample. The vowel characteristics are processed to identify a first vowel pronunciation metric for the first vowel sound and a second vowel pronunciation metric for the second vowel sound, and the first vowel pronunciation metric and the second vowel pronunciation metric are processed to determine whether the non-native speech sample exhibits a distinction in pronunciation of the first vowel sound and the second vowel sound.

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