24. The method of claim 14 , wherein step (a) comprises: a.1) creating a pronunciation dictionary that defines a sequence of phonemes for each of the predetermined keywords; a.2) creating an acoustic model that statistically models a relation between textual properties of the phonemes for each of the predetermined keywords and spoken properties of the phonemes for each of the predetermined keywords; and a.3) concatenating acoustic models for the sequence of phonemes for each of the predetermined keywords.
24. The method of claim 14 , wherein step (a) comprises: a.1) creating a pronunciation dictionary that defines a sequence of phonemes for each of the predetermined keywords; a.2) creating an acoustic model that statistically models a relation between textual properties of the phonemes for each of the predetermined keywords and spoken properties of the phonemes for each of the predetermined keywords; and a.3) concatenating acoustic models for the sequence of phonemes for each of the predetermined keywords. 25. The method of claim 24 , wherein step (a.2) comprises creating a set of Gaussian mixture models.