1. A method, comprising the steps of: determining a vicinity from which speech input to a speech recognition system originates; obtaining non-acoustic data from the vicinity of the speech using one or more non-acoustic sensors; identifying a subject speaker as the source of the speech input from the obtained non-acoustic data; analyzing one or more non-acoustic attributes of the subject speaker; and adjusting a speech recognition system based on the one or more analyzed non-acoustic attributes; wherein the steps are performed by at least one processor device coupled to a memory.