16. The non-transitory computer-readable medium of claim 13 further comprising computer-executable instructions that, when executed by the processor, cause the processor to perform the additional steps of: receiving all the location; determining the geo-centric language model, corresponding to the region defined by the determined radius about the location of the mobile communications device, including selecting one of a plurality of language models stored in a language model database that covers said region; receiving an audio input provided by the user; and processing the audio input based at least in part upon the determined language model to determine a search request identified in the audio input.
20. The non-transitory computer-readable medium of claim 16 further comprising computer-executable instructions that, when executed by the processor, cause the processor to perform an additional step of combining the geo-centric language model and a national language model using a count merging combination strategy or a language model union combination strategy.