1. A computer-implemented method, the computer-implemented method comprising: under control of one or more computing devices configured with specific computer-executable instructions, obtaining audio data comprising speech from a first device; transcribing the speech using an automatic speech recognition engine having a statistical language model to generate a transcription comprising one or more words; determining a characteristic related to the audio data, wherein the characteristic is not determined from the one or more words of the transcription; selecting a filter for the transcription, wherein the filter is selected based at least in part on the characteristic; and applying the selected filter to the transcription to generate a filtered transcription.