A speech corpus (or spoken corpus) is a database of speech audio files and text transcriptions.
In speech technology, speech corpora are used, among other things, to create acoustic models (which can then be used with a speech recognition or speaker identification engine).
[1] In linguistics, spoken corpora are used to do research into phonetic, conversation analysis, dialectology and other fields.
Corpora is the plural of corpus (i.e. it is many such databases).
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