5. A computer-implemented method comprising: obtaining, by a spoken language processing system comprising one or more computing devices configured to execute specific instructions, audio data regarding an utterance; determining, by the spoken language processing system, one or more articulatory features associated with a portion of the audio data; identifying, by the spoken language processing system, a subset of a plurality of acoustic model components based at least on the one or more articulatory features; computing a score, using the subset and by the spoken language processing system, for a feature vector for the portion of audio data; and generating, by the spoken language processing system, automatic speech recognition results based at least on the score computed for the feature vector, wherein the automatic speech recognition results comprise one or more transcriptions corresponding to the utterance.
5. A computer-implemented method comprising: obtaining, by a spoken language processing system comprising one or more computing devices configured to execute specific instructions, audio data regarding an utterance; determining, by the spoken language processing system, one or more articulatory features associated with a portion of the audio data; identifying, by the spoken language processing system, a subset of a plurality of acoustic model components based at least on the one or more articulatory features; computing a score, using the subset and by the spoken language processing system, for a feature vector for the portion of audio data; and generating, by the spoken language processing system, automatic speech recognition results based at least on the score computed for the feature vector, wherein the automatic speech recognition results comprise one or more transcriptions corresponding to the utterance. 13. The computer-implemented method of claim 5 , wherein the determining comprises determining a parameter from at least the portion of audio data, the parameter reflecting at least one of zero crossings, energy, auto-correlations, or linear-predictive coefficients.