30. A word recognition apparatus as in claim 29, wherein: said word recognizer is a speech recognizer; said user generated signals are representations of human utterances; and said signal models are acoustic word models;
29. Word recognition apparatus comprising: input means for receiving successive user generated signals from a user, each of which represents a word to be recognized; means for storing a plurality of sets of signal models for each of a plurality of vocabulary words; recognition means for scoring a match between each such user generated signal and each of a plurality of said signal models, and for selecting a recognized word for that user generated signal based on such scorings; model set selecting means, including means for causing said recognition means to score one or more of said user generated signals against signal models of each of said sets, for selecting that one of said sets which produces the best scores against said user generated signals, and for causing said recognition means to give more weight to scorings of said user generated signals against signal models of said selected set than to scorings against signal models of any other of said sets.