11. The system of claim 7 , the computer-readable storage medium having additional instructions which result in operations comprising estimating, via successive comparisons, a background noise parameter.
7. A system comprising: a processor; and a computer-readable storage medium having instructions stored which, when executed by the processor, cause the processor to perform operations comprising: generating a user identifier using a voice request, the voice request received from a device; estimating, via successive comparisons, a transducer noise parameter of the device, wherein a delay between the successive comparisons is increased when successive changes do not exceed a threshold value; comparing stored user identities to the user identifier, to yield a comparison; when, based on the comparison, a user is associated with the device: retrieving a parameterizable speech recognition model associated with the user identifier; and adapting the parameterizable speech recognition model based on the transducer noise parameter to yield an adapted parameterizable speech recognition model; and performing speech recognition on the voice request using the adapted parameterizable speech recognition model.