11. The method of claim 9 , wherein step (a.2) comprises creating the acoustic model selected from the group consisting of: context-independent model, context-dependent model, and triphone model.
9. The method of claim 1 , 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.