15. A non-transitory computer-readable storage medium storing software comprising instructions executable by one or more computers which, upon such execution, cause the one or more computers to perform operations comprising: receiving, by an application server of an automated speech recognition system that includes (a) the application server, (b) a background audio recognizer, (c) a conceptual expander component, (d) an automated speech recognizer, and (e) a speech recognition language model, an audio stream at a computing device, the audio stream comprising user speech data; identifying, by the background audio recognizer of the automated speech recognition system, concepts from audio features of the audio stream; generating, by the conceptual expander component of the automated speech recognition system, a set of terms related to the identified concepts; influencing the automated speech recognizer of the automated speech recognition system based on at least one of the terms related to the identified concepts, comprising adjusting one or more probabilities or relevance scores of the speech recognition language model, wherein each of the one or more probabilities or relevance scores corresponds to a term related to the identified concepts; providing, by the application server of the automated speech recognition system, the audio stream to the influenced automated speech recognizer; generating, by the automated speech recognizer of the automated speech recognition system, a recognized version of the user speech data; and providing, by the application server of the automated speech recognition system, the recognized version of the user speech data, for output.
15. A non-transitory computer-readable storage medium storing software comprising instructions executable by one or more computers which, upon such execution, cause the one or more computers to perform operations comprising: receiving, by an application server of an automated speech recognition system that includes (a) the application server, (b) a background audio recognizer, (c) a conceptual expander component, (d) an automated speech recognizer, and (e) a speech recognition language model, an audio stream at a computing device, the audio stream comprising user speech data; identifying, by the background audio recognizer of the automated speech recognition system, concepts from audio features of the audio stream; generating, by the conceptual expander component of the automated speech recognition system, a set of terms related to the identified concepts; influencing the automated speech recognizer of the automated speech recognition system based on at least one of the terms related to the identified concepts, comprising adjusting one or more probabilities or relevance scores of the speech recognition language model, wherein each of the one or more probabilities or relevance scores corresponds to a term related to the identified concepts; providing, by the application server of the automated speech recognition system, the audio stream to the influenced automated speech recognizer; generating, by the automated speech recognizer of the automated speech recognition system, a recognized version of the user speech data; and providing, by the application server of the automated speech recognition system, the recognized version of the user speech data, for output. 19. The computer-readable storage device of claim 15 , wherein generating the set of terms related to the identified concepts comprises: querying a conceptual expansion database for terms related to the identified concepts, wherein the conceptual expansion database contains a plurality of documents related to a plurality of concepts.