6. A headset, comprising: a first microphone for receiving audio input; a memory; and a processor for executing instructions stored in the memory, the instructions comprising a sound classifier, wherein, when executing the sound classifier, the processor is configured for: receiving a plurality of frames of audio generated from the audio input received by the first microphone; analyzing each of the plurality of frames of audio; classifying a first number of the frames of audio as speech; classifying a second number of the frames of audio as non-transient background noise; classifying a third number of the frames of audio as transient noise events; and transmitting signals indicative of at least the classifications of the frames of audio to a speech recognition system.
6. A headset, comprising: a first microphone for receiving audio input; a memory; and a processor for executing instructions stored in the memory, the instructions comprising a sound classifier, wherein, when executing the sound classifier, the processor is configured for: receiving a plurality of frames of audio generated from the audio input received by the first microphone; analyzing each of the plurality of frames of audio; classifying a first number of the frames of audio as speech; classifying a second number of the frames of audio as non-transient background noise; classifying a third number of the frames of audio as transient noise events; and transmitting signals indicative of at least the classifications of the frames of audio to a speech recognition system. 15. The headset of claim 6 , wherein: the headset wirelessly transmits the signals indicative of at least the classifications of the frames of audio to a speech recognition system separate from the headset that implements a speech recognizer; and the speech recognizer is configured for adjusting a threshold at which a recognized hypothesis based on the audio is either rejected or accepted based at least in part on distinguishing among speech events, non-transient background noise, and transient noise events.