4. The method of claim 1 , wherein step (b) further comprises: obtaining a total likelihood score α r for each of the plurality of speech audio files.
4. The method of claim 1 , wherein step (b) further comprises: obtaining a total likelihood score α r for each of the plurality of speech audio files. 6. The method of claim 4 , further comprising using the mathematical equation β r = α r f r to determine the average frame likelihood score of an audio file, wherein β r is the average frame likelihood score, α r is a total likelihood score of the audio file, and f r is a number of feature frames of the audio file.