12. A computing device configured to convert audio data to text data, comprising: an audio capture device configured to receive audio data, the received audio data representing spoken utterances; an automatic speech recognition (ASR) module configured to transform the received audio data into a sequence of speech units represented in the audio data; at least one processor; a memory device including instructions operable to be executed by the at least one processor to perform a set of actions, configuring the at least one processor: to determine a first duration of the sequence of speech units of the received audio data; to determine, using the first duration, an expected duration of a single speech unit of the received audio data in the sequence of speech units; to determine, by the ASR module, a second duration of the single speech unit; to determine a duration score of the single speech unit, the duration score corresponding to the second duration in relation to the expected duration; to determine a speech recognition result based at least in part on the duration score of the single speech unit, wherein the speech recognition result is the text data corresponding to the received audio data representing speech; and to cause a command to be executed using the text data.
12. A computing device configured to convert audio data to text data, comprising: an audio capture device configured to receive audio data, the received audio data representing spoken utterances; an automatic speech recognition (ASR) module configured to transform the received audio data into a sequence of speech units represented in the audio data; at least one processor; a memory device including instructions operable to be executed by the at least one processor to perform a set of actions, configuring the at least one processor: to determine a first duration of the sequence of speech units of the received audio data; to determine, using the first duration, an expected duration of a single speech unit of the received audio data in the sequence of speech units; to determine, by the ASR module, a second duration of the single speech unit; to determine a duration score of the single speech unit, the duration score corresponding to the second duration in relation to the expected duration; to determine a speech recognition result based at least in part on the duration score of the single speech unit, wherein the speech recognition result is the text data corresponding to the received audio data representing speech; and to cause a command to be executed using the text data. 13. The computing device of claim 12 , wherein the at least one processor is further configured to compute the duration score using at least one of a chi-squared model or a mixture model.