1. A method comprising: identifying a speed of a caller in a communication session; classifying a background environment of the caller based at least in part on the speed of the caller, to yield a background environment classification; selecting an acoustic model matched to the background environment classification from a plurality of acoustic models; and performing speech recognition on a received audio signal from the caller using the acoustic model.
1. A method comprising: identifying a speed of a caller in a communication session; classifying a background environment of the caller based at least in part on the speed of the caller, to yield a background environment classification; selecting an acoustic model matched to the background environment classification from a plurality of acoustic models; and performing speech recognition on a received audio signal from the caller using the acoustic model. 4. The method of claim 1 , wherein the background environment classification comprises one of office, airport, street, vehicle, train and home.