1. An automated speech recognition system comprising: a plurality of confidence measurement generating devices that generate a plurality of confidence measurements, at least one of the plurality of confidence measurements being a first type of confidence measurement and at least one of the plurality of confidence measurements being a second type of confidence measurement, where the first and second types of confidence measurements are different types of confidence measurements, the first and second types of confidence measurements corresponding to separate knowledge sources, wherein: the automated speech recognition system inputs a signal representing an utterance to be recognized, the signal comprising at least one portion, and each confidence measurement generating device inputs that signal and outputs at least one confidence measurement of at least one of at least the first and second types of confidence measurements for each portion of that signal; a normalizing device that inputs the plurality of confidence measurements comprising at least the first and second types of confidence measurements and outputs a plurality of normalized confidence measurements of at least the first and second types for each portion of the utterance; and an integrator that inputs, for each portion of the utterance, the plurality of normalized confidence measurements of at least the first and second types and outputs, based on the plurality of normalized confidence measurements of at least the first and second types for that portion of the utterance, a signal indicating whether that portion of the utterance has been correctly recognized.