22. The method of claim 21 , wherein step (e.2) comprises computing further data selected from the group consisting of: anti-word match scores, mismatch phoneme percentage, match phoneme percentage, duration penalized probability, and a predetermined Confidence value.
22. The method of claim 21 , wherein step (e.2) comprises computing further data selected from the group consisting of: anti-word match scores, mismatch phoneme percentage, match phoneme percentage, duration penalized probability, and a predetermined Confidence value. 23. The method of claim 22 , wherein the predetermined Confidence value is chosen for each of the predetermined keywords so as to achieve a desired false alarm rate and accuracy.