15. The method of claim 12 , wherein step (b) further comprises: obtaining a total likelihood score α r for each audio file of the plurality of speech audio files.
16. The method of claim 15 , wherein the total likelihood score is obtained using the mathematical equation: α r =p(x 1 |q 1 )Π i=2 N P(q i |q i-1 )p(x i |q i ), where P(q i |q i-1 ) represents a Hidden Markov Model state transition probability between states ‘i−1’ and ‘i’ and p(x i |q i ) represents a state emission likelihood of a feature vector x i being present in a state q i .