15. Non-transitory computer-readable media as recited in claim 12 , wherein the submitting comprises submitting the alternative character strings, one at a time, in an order based at least in part on respective probabilities or confidence levels that the audio includes respective series of sounds representing the respective character strings.
12. Non-transitory computer-readable media storing computer-executable instructions that, when executed on a processor, cause the processor to perform acts comprising: decoding audio at least in part to determine a number of alternative character strings from the audio; and submitting, one at a time, the alternative character strings as a password until the earlier of authentication or until each of the number of alternative character strings has been submitted; wherein the decoding utilizes a language model, the acts further comprising: identifying a candidate character string of the alternative character strings that, upon submittal, results in authentication; and sending the candidate character string of the alternative character strings over a wireless network and to an entity to allow the entity to train the language model or another language model using the candidate character string of the alternative character strings.