19. The method of claim 15 , wherein performing the forced Viterbi alignment further comprises: obtaining a total likelihood score α r for each audio file of the plurality of speech audio files.
19. The method of claim 15 , wherein performing the forced Viterbi alignment further comprises: obtaining a total likelihood score α r for each audio file of the plurality of speech audio files. 21. The method of claim 19 , wherein an average frame likelihood score of an audio file is obtained using a mathematical equation: β r = α r f r wherein β r is the average frame likelihood score, α r is the total likelihood score of the audio file, and f r is a number of feature frames of the audio file.