44. A speech recognition system, comprising: a sound classifier that includes at least one non-transitory processor-readable medium and at least one processor communicatively coupled to the at least one non-transitory processor-readable medium, and that analyzes a first segment of audio, determines at least two confidences among the following three confidences: a first confidence that the first segment of audio is speech; a second confidence that the first segment of audio is non-transient background noise; or a third confidence that the first segment of audio is transient background noise; generates a hypothesis for a second segment of audio that includes the first segment of audio; and adjusts a threshold at which the hypothesis is either rejected or accepted based at least in part on the at least two confidences.
44. A speech recognition system, comprising: a sound classifier that includes at least one non-transitory processor-readable medium and at least one processor communicatively coupled to the at least one non-transitory processor-readable medium, and that analyzes a first segment of audio, determines at least two confidences among the following three confidences: a first confidence that the first segment of audio is speech; a second confidence that the first segment of audio is non-transient background noise; or a third confidence that the first segment of audio is transient background noise; generates a hypothesis for a second segment of audio that includes the first segment of audio; and adjusts a threshold at which the hypothesis is either rejected or accepted based at least in part on the at least two confidences. 45. The speech recognition system of claim 44 wherein, the sound classifier receives input from at least two microphones.