11. A system according to claim 10 wherein: said speech recognition engine comprises an acoustic model with the plurality of adjustable parameters; the difference engine matches the at least one of the plurality of acoustic differences to a matched adjustable parameter of the plurality of adjustable parameters; and the compensation controller adjusts the acoustic model by varying the matched adjustable parameter to reflect the at least one of the plurality of acoustic differences.
11. A system according to claim 10 wherein: said speech recognition engine comprises an acoustic model with the plurality of adjustable parameters; the difference engine matches the at least one of the plurality of acoustic differences to a matched adjustable parameter of the plurality of adjustable parameters; and the compensation controller adjusts the acoustic model by varying the matched adjustable parameter to reflect the at least one of the plurality of acoustic differences. 14. A speech recognition system according to claim 11 wherein the compensation controller varies the matched adjustable parameter as a function of a magnitude of the corresponding at least one of the plurality of acoustic differences.