  This paper introduces a new open-source speech corpus named "speechocean762"
designed for pronunciation assessment use, consisting of 5000 English
utterances from 250 non-native speakers, where half of the speakers are
children. Five experts annotated each of the utterances at sentence-level,
word-level and phoneme-level. A baseline system is released in open source to
illustrate the phoneme-level pronunciation assessment workflow on this corpus.
This corpus is allowed to be used freely for commercial and non-commercial
purposes. It is available for free download from OpenSLR, and the corresponding
baseline system is published in the Kaldi speech recognition toolkit.
