1. A method for predicting word accuracy, comprising: obtaining an utterance in speech data, wherein said utterance comprises an actual word string; processing said utterance for generating an interpretation of said actual word string; processing said utterance to identify at least one utterance frame; and predicting a word accuracy associated with said interpretation according to at least one stationary signal-to-noise ratio and at least one non-stationary signal to noise ratio, wherein said at least one stationary signal-to-noise ratio and said at least one non-stationary signal to noise ratio are determined according to a frame energy associated with each of said at least one utterance frame.